Yeah, no. Speaking of "personal discipline" makes it obvious you have never seriously dealt with addicts. Solving it long term is basically impossible for some of us; pretty sure because of how our brains are wired at the physical level. I know all the (popular) science, I discussed it with a good doctor whom I personally know, I know you're supposed to change your habits long-term (and how you're supposed to do it), and I recently lost 15 kgs of weight for the fourth time in my life. The longest time I managed to maintain healthy weight was maybe 3-4 years. If Ozempic (or whatever) actually solves this, I'm ready to go on it for the rest of my life.
I also live in a "vodka belt" and know several alcoholics who tried very hard to maintain their "personal discipline". It's impossible for most of them -- almost all relapse in a few years' time.
I'm one of those people who has repeatedly lost weight by managing food intake. I'm talking about losing over 30 pounds, more than once. It might have been three times. Oh yea and I've kept it off for close to a decade now. I didn't use drugs. At times I used a food scale to manage portions. At times I literally just microwaved broccoli for a snack/meal. I still do it periodically if I'm feeling self-conscious. Does it suck? Yep. Have you guys ever tried those things?
I mention this because I feel like you need somebody who has gone through the experience to actually have credibility in the conversation, to tell you that personal discipline is a real thing that can achieve results. I think it's ridiculous how quickly you dismissed the parent post.