I'm not a medical professional, but comparing a vaccine, which briefly introduces a protein into the body and then leaves, to a chronic and potent medication that makes drastic changes to your body is worse than foolhardy.
You name the weight loss treatment, I've seen a close relative try it. G-d blessed me with obesity in just about every gene possible in my family tree. The drugs and surgeries invariably don't work, cause huge strains on quality of life, or both. This is not the first time a drug came in the market with seeming miraculous off label weight loss ability. People died from some of them.
Even people that tout ozempic as a miracle will talk about having to throw their guts up, it's just that they feel that suffering is worth it. Perhaps it is, but you're delusional if you think that is the worst of it and that there isn't a strong liklihood for more awful side effects down the road, if not downright deadly ones.
May we all be healthy and happy, without sacrificing one for the other.