Exactly. Usain Bolt does not have the same physique as Mo Farah, for instance and neither would have won Olympic medals in each other's chosen field.
There are misconceptions around what constitutes a ballet physique. Ask any member of the general public and they will mention 'extremely thin'. They won't mention the small head, the long neck, level shoulders, a short body and long, perfectly straight legs that are both the same length, a degree of hypermobility, naturally good balance, rhythm, musicality, proprioception, the right-shaped feet that neither pronate nor supinate, or having hip joints that facilitate flat turnout. None of those things can be achieved by dieting.
I'm appalled by what still happens in vocational ballet training in this country, and that applies to all the schools, not just the one in the news yesterday. My dd had an unpleasant experience at another one, and was discarded as damaged goods. Nothing to do with weight or body shaming in her case, although she was aware that some others did have that issue, particularly at another establishment.