It depends on the motivation behind doing this, how much money the person has, how much money they spend on charitable causes, how much money they spend on other stuff to do with their appearance, etc. There are people such as politicians and actors whose livelihood might depend to some extent on them looking a certain way, and in their case a hair transplant might be seen as an investment in themselves to help their career, keep their current job status, etc.
I personally think it is kind of a dumb idea, since many successful men have been balding or had shaved heads, etc. but it is not my head, so not my judgment to make. I doubt this is something we would ever spend money on in our own family, but I’m not going to point fingers at somebody else who I don’t even know for choosing to try it.