Power is pretty corrupting and anyone who is a famous person (as in, public enough to maintain fame as opposed to just broad recognition) probably has a bit of an ego.
I mean your average normal person would be like “Don’t idolise me, I’m just someone who writes books you like. Now please leave me alone” not posting on tumblr to adoring young fans.
Not actually true anymore but they’re not very performant.
Fine for a handgun to kill someone up close with, but it’s not like making a machine to dohickey someone a la Abe is very difficult.