I'm leaning toward the dance and gymnastics (I'd toss figure skating in there too) line of thinking. These sports lean heavily into the tiny, slim pretty little girl (or balletic young man) dynamic while also requiring the development of the extreme flexibility that aids in gaining that precious EDS diagnosis. Kids in these sports have lives that revolve around staying small, exercising, and being judged on how they look while performing. What happens if you don't find success before you 'age out'? What if you grow too tall or too wide? When your whole life has been about not eating and not growing into an adult body, the transition to adulthood is rough.
There's a term that floats around in dance/gymnastics/skating communities - "the puberty monster". That refers to girls and boys being attacked by puberty and losing elements they could do with ease in smaller, undeveloped bodies. Promising kids begin to attract wider attention when they're around 10-12 years old in those disciplines. There's a narrow time window in which an aspiring dancer/gymnast/skater can hope to be selected for bigger things. When that doesn't happen, there's a crushing sense of What did I do with my youth? For some, that could translate into creating an extended childhood of sorts, needing care and continuing as the small uwu cutie everyone else needs to continue structuring their lives around.
Things are improving, albeit slowly, in gymnastics and skating. Adult bodies aren't as frowned upon as they were for the last 40 years and competitors are sticking around more often beyond their teens. However, there's still a tendency within the establishment to promote waifish, childlike girls and whenever one comes along, she's showered with high scores at competitions. Dance is dance, but at least there's more opportunity for adults to make a career there. A mentally and physically stressful career, but a career nonetheless.