[tidepod12]

AFAIK this isn't necessarily true. The transplanted follicles will not suffer the same fate as your original follicles, so the "new" hair won't just "fall out". The thing about transplants is that, depending on how much existing hair you have, the transplant is really only used to fill in missing spots. This means it's essential to stop any more of the existing hair from falling out, or you'll need another transplant later to cover up the new spots. The reason most people are prescribed finasteride/minoxidil is to slow/prevent any of that existing hair from falling out.