As a former model I understand that self criticism. I retired from modelling when my clients complained about my weight.
I stay within 145-150 Ibs range but they wanted me to lose 20 pounds for a project they were hiring me for.
I did lose the weight to get that job but I knew that wouldn't be the last so I said 'enough is enough' to people telling me how to keep my body.
Your daughter did a great thing quitting dancing. At a point in your stardom you would realise your happiness and wellbeing matters more.