Growing up, I had one very specific idea of what a wedding should be, and that was the wedding of Fraulein Maria and Captain von Trapp in 'The Sound of Music.'
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.