I think weight and sports works like this: If your weight prevents you from being competitive, you have several options: leave the sport; stay in sport but don't expect high results; find a healthy way to control your weight to a point where it does not hinder athletic requirements. If an athlete for various reasons can not comply, due to weight, with athletic requirements of a given sport, then he/she has to make choices.
I don't like when such conversations lead in a direction of "oh, this sport is so demanding on the girls, they are inclined to develop ED and become anorexic." What does it mean? prohibit 3X jumps in competitions so that heavier girls can compete in the Olympics? One has to be a certain weight (proportionately to other physical specifics of ones body) not exactly for aesthetics but to be able to perform certain athletic elements..
If one is too heavy to do a 3X, then one is too heavy to do 3X.... either loose weight, or develop more muscle to lift yourself, or leave, or skate on lower level....
But when a score in certain sports includes "aesthetics" (skating, gymnastics, art-swimming, etc), a heavier athlete usually has less flexibility and his/her element may show less quality and less difficulty, and receive less points...
http://media.zenfs.com/en_us/News/ap_webfeeds/d9ddeead009cd0056c0f6a706700238c.jpg
https://i.pinimg.com/236x/aa/a7/ed/...89358--figure-skating-dresses-ice-skaters.jpg
That's life.. Don't like it, change to another sport, which suites your weight/body and requirements.....