I try to explain to people that you get the roles that are right when they're right. If you have a nerd character but you're kind of a cool guy you're probably not going to get the nerd part. The nerd is going to get the nerd part. You know someone like me.
I have always been aware that you have to get people listening before you can change their minds. Any artist's big fear is being ignored so if you get debate that's great.