Yes, we all care about looks (to varying degrees). Looks can be overcome, however, if you have other positive attributes. People over-generalize. That would be like saying men don't care about personality and a girl can be an idiot, annoying, etc. and it won't matter.

Braces can't close up gaps if there's too much space inbetween his teeth
I'd just get my teeth fixed and we'd live happily ever after.