The weird thing is that I don’t. My grandpa on my mother’s side had almost all his hair when he died around 70 years old and my dad who is 60 has only very minor hair loss. Admittedly my grandpa on my dads side did start losing his hair at around 40 years old, but I see no reason to think that my hair should start falling out at 17. I have looked at my crown and it looks no worse than it was 1 year ago, so I am mostly just confused.