How precious is your hair?
I have come to believe that there are two types of people in this world: those who safeguard their hair like a precious resource (a resource they happen to wear up near their face, every day, all the time, in front of everyone, and therefore would prefer not to take risks with), and those who are like "whatever, it grows back."
(Kitty from That '70s Show is sort of like a type 1 who gets forced into type 2 behavior because she loves Laurie too much -- remember that ep when she let Laurie cut her hair for cosmetology school?
I think I'm more of a type 2 myself, hence a few shaved heads over the years (and yes, it did indeed grow back... though the grow-out interim was a b-word.) In some cases it has served me well (being willing to take a cosmetic risk that totally paid off) and in other cases... it has served me less well.