It is, but weight loss is something that has appeal beyond just a medical context, and the danger is people starting to see it as a "side effect free" form of weight loss.
Any such impression creates an issue in a society where plenty of people have body dysmorphia and eating disorders.
My friend's daughter is trying to "eat up" to eligibility as she sees that as easier than going backwards.
It also tends to make people feel gaining in the first place is not such a big deal as they can "just get the jabs."
I do know people who have become ill-looking on them and properly skeletal.
None of that is a desirable outcome, and, I guess, a worry for families and friends of people who battle some of these body image issues.
I think it is wonderful for people who genuinely need it. I know people who are obese and it genuinely has been a struggle for them to lose - not greedy, not lazy, it is just complicated. One of them I wish would take the WLIs, tbh, as I'd love her MIL to stop saying it isn't "worth" her spending money on nice clothes and the other sick and cruel things she tries to body shame her with.
But I think where people would feel more comfortable is if the discussion was more "I needed the WLIs and the risks were worth it for me, but, of course, I would rather not have had to." It is just far more balanced - and I suspect actually a reflection of reality - than this vehement insistence they are simply a brilliant and unmitigated panacea, no worries, no doubts.