But for fat people, the calculus looks different.
A decision to take semaglutides is a decision between the long-term negative effects of obesity *now*, or the possibility of long-term negative effects *later.*
Anecdotally, trans people have a similar calculus. Going unmedicated/unsupported brings significant mental health risk now[1], whereas going on hormone replacement may or may not cause complications much later in life (osteoperosis, hepotoxicity issues for some treatments, etc).
Either way, you gotta get to the "later in life" part before you can worry about the outlook there.
1: a CDC meta-review said that 26% of surveyed US trans students attempted suicide this year, N=20,103 surveyed, ~660 of which were trans. https://archive.ph/0H81G