I have always been very slim, never having made any effort to this. Actually the opposite: I always wanted to be a little heavier, to look like normal people. I never managed it though.
Only recently I found I have a particular form of pancreas issues that impact my digestion in a very particular way. Not only I cannot gain weight but I feel several undesirable symptoms (usually subtle but noticeably bad) whenever I consume quite a lot of things, especially fatty foods.
I was told that Ozempic basically makes other people be more like me. I cannot say anything about how true this is, but I would, at any time, choose to be a little overweight over being me.