I think it is because the follicles need to be in anagen phase, and they should all be in anagen phase now after they started growing, so basically then it is a headshot on the follicle.
The problem that otherwise can occur if you for example want to remove some chest hair with Electrolysis is that some hairs is in the resting phase and then you need many sessions to fully remove them.
I need maybe 3-4 sessions more atleast. I was told maybe 10 sessions from the start and we had 4 now. I think 8-10 will be needed for me to be happy and in the next transplant we can focus on additional density for the hairline and the upper temples.