> to escape weight stigma, rather than to serve a true health need
This is an unfair framing by the researchers
For a while I worked in pharma on a drug program for a harmless* "ailment", nail fungus. What I learned is that some people suffer serious psychological consequences, such as marital issues or avoiding situations where they might be barefoot, like the beach. People who have it in their hands may avoid social situations all together, which is even worse and reduces life expectancy.
We have a natural cultural bias in this regard. It's not just the phantom of the opera: in films the hero usually has a clear complexion and the villain often does not (not always to the extent of Darth Vader of course). Now we understand more about disease etiology this bias is no longer helpful, and is in fact destructive.
Losing weight addresses true health needs (increased rates of cancer, cardiac issues etc) but weight stigma has important side effects as well.
* The various fungi that attack skin, scalp, nails etc eat a particular shape of squalene which some people make (referred to unfairly in the medical literature as a "squalene defect"). You're not going to catch it from another person -- there's a good chance you're breathing the spores right now. Either you're genetically predisposed or you're not. And all it does is munch on a tiny amount of your body and causes no other problem.