DNA has too much variation to lump them together as fragile strains that don't handle topping very well. I've grown Chocolate Fondue (fem), Skywalker Kush (fem), and Cannalope Haze (reg) and they all have been extensively topped and cropped.
I just took a peak in a local (dutch) forum and of the first two LA Woman grows I found one was a beginner with multiple hermies, the other a pro with (seemingly) no hermies. So again, perhaps LA Woman simply 'is' more prone to hermie than others. Or as you say, more fragile. I prefer to refer to it as low stress resistance because the term hermie is so abused and misused.
It's not a matter of "stable" though. Stable strains can still hermie. Stable strains produce very similar plants. If a strain produces 100% hermies, it's stable for that trait. Not stable means not only using bad genetics but also doing a poor job breeding, both things I don't associate with DNA genetics (and more something you can expect from the fem-only bean makers).
I used to think the same thing, but in reality great stuff can be easy to grow too and crappy stuff can be hard to grow. It's like quality not having to be expensive and pretty girls not hard to get.
If there's any truth to getting stronger girls by pointing an oscillating fan at it it's during veg and not flowering. But if your plants are so weak they need wind to make them stronger you should look for different genetics or a better nutrient regime. I live in a crappy humid climate where closet and tent growers sometimes just
need to blow at buds to prevent bud rot (i.e. when the air sucked in isn't dry enough). The downside is therefor well-known, terpenes are extremely volatile. Fans are for air circulation/movement, not to create a wind. Not that the growers in the dutch forums are such experts, but aiming fans at buds or stems is a bluntly put a noob move. If you aim the fan to blow above the canopy but below the bulb it will still cause plenty of movement, but without cooling or putting plants in the wind.
Besides humidity the temps aren't always ideal here either, meaning sucking in cold air. This often comes at a cost of stress (including purple stems) of the plant(s) near the intake. Not having the intake in balance with the exhaust (creating a storm in the tent as we say) makes that even worse.
Ok, I can totally see how that leads to the perception of DNA genetics being the main cause here. I'm sure you got it by now but my whole point is that that remains a tricky conclusion. Let me put it this way, if 5 people getting hermies would exclude a breeder there won't be much left to choose from. At the same time there are many DNA gear growers who don't grow hermies.
If almost every single one is affected then yes, I'm inclined to think it's you (your environment that is, not you personally
). Selling hermies is the worst thing a breeder can do, hence why every breeder selects against intersex traits, getting so many hermies from a good breeder is just unlikely, frankly, even with GHS or RQS that is unlikely if grown in a good environment. Switching from 18/6 to 12/12 on a single day is likely not the cause either. I always do that and yes that does cause a little stress (opposed to gradually changing like outdoors would happen) but should cause intersex traits to appear.
There's a chance you've just been really unlucky. As you perhaps noticed in one of my posts about intersex cannabis plants are flexible when it comes to their sexual expression. It's not until the 4th or 5th node that they start committing to either male or female. Same thing when you switch to flowering before they matured (i.e. before fully sexed and preflowers), it's a critical moment where a strain with low stress resistance may just hermie for a combination of by itself small influences. You may never be able to find the real cause because there's not necessarily one single cause.
Switching to a different breeder or at least different strain (with different parents than the la woman) is wise in any case because you can at least exclude it from being the issue.
Tough question. Picking a breeder and seeds is the hardest part. The main factor for me is taste, and since that's a matter of taste what I recommend may not suit you at all... Easier to recommend against... like don't buy seeds from bean makers who make only fem seeds. Not because fem seeds are bad, but because those who only use females are usually not the better breeders. Fem seeds are convenient for the grower, like a shortcut (to having all females). It's something a breeder should created at the end of the line (I.e. breed reg strain than make fem version) and not like a shortcut.
That said, if I had to recommend one to you I'd say take a look at Sannie seeds. He's my fallback option. As in if I'd be lost and don't know what to pick I'll order some from Sannie. I can ask a mod in his forums (he owns the largest dutch grow forum) which is the least likely to herm based on the experience of others. If money is not an issue another one I can recommend is NL#5xHaze from sensiseeds (many
many of the popular strains are based on NL#5xHaze). If I were you I'd forget about the hermie thing for a while, pick something you think you like growing and smoking and then google to see if it hermied a lot for other growers.
Can, and then everyone will still know what you mean. And it in fact can be a real herm, the point is that it doesn't necessarily mean it is, and above all, often isn't the case. So yes, when you "wanna be accurate", not every female that spawns bananas is an actual hermaphrodite. If you leave a female flowering long enough (beyond harvest time) it often spawns bananas too. The problem comes partly from the misleading term "male flowers"... (opposed to saying staminate flowers, which a female can grow too). I will do a lab test soon (gender + hermie test) to get more insight and either prove myself wrong or right
"Myself" because the public debate will probably never end.
Problem with most growers is that they can't even stand the thought of being wrong. I might be wrong about everything in this thread. Maybe LA Woman has a high hermie ratio...
Hence the "friendly heads up", blaming the breeder without making very damn sure it's not your own fault (which the imaginary friends imply) is going to lead to ironic and for you disappointing results. 
Too much characters for a single post, here's the rest:
I'll give you at feedback on my LA Con' if you're interested.