You're being cast for your acting ability. It's not based on the way your body functions. If you're playing a lead in a movie, it's for that character and they'll tailor it to you. In a dance company, you have to fit in a definite mold.
“To be successful you have to be selfish, or else you never achieve. And once you get to your highest level, then you have to be unselfish. Stay reachable. Stay in touch. Don't isolate.”