Tipping the end of the leaves actually do?
I read somewhere that when the buds are growing that they get covered in thricohmes but im not if that is true
So can you please help me out and tell me

Do you mean clipping the end of the leaf?
Clipping the end off of a couple of individual blades stops that particular leaf from growing supposedly putting growth energy to the other parts of the plant.

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If it supposedly stop the growth in the leaves and focused on different parts of the plant. If you clipped the ends of the leaves during the flowering stage, would it put more energy into the flowering or into repairing the leaves?

No absolutely NOT! Someone gace you wrong information.
Its does nothing but stunt the plants growth.