The only downside is you have to be one of the lucky responders to it, a lot of people don't get amazing regrowth on finasteride so have to seek alternative ways to gain their hair back, sometimes that means the use of estradiol etc It is what it is i guess.
Have to? Lol, let's not get into that discussion, the only thing i agree with is that anybody is free to do whatever, that does not mean that "you have to", it's bullshit excuses for mental illnesses and their shitty actions, nothing more...