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.
At what point are you willing to concede that it might not be feasible for someone that isn't you? If it were 10% harder do you think you would have stuck through it? 50% harder? The numbers say the proportion of people who are successful is very small and there are sure a lot of people who are trying
Edit: I'll add that I've successfully shed 100lbs through discipline before. With the life I currently as caretaker for my son I don't nearly as much room in my life for the mental overhead that sort of change in diet required me in the past.
I've gone through that experience multiple times as well. Also over 30lbs each time. Also having kept it off for years, although not quite a decade for my longest period. COVID was my last regression, as it was for many who lost it and maintained it the way we both did.
The GLP-1's are a game changer. I will never lose weight the "white knuckle" way again. I can, and I have proven it to myself and others. It's not complicated as you say - it's quite simple.
It's simply such a giant imposition on your life and mental well being that I am thankful others won't have to go through it as their only option in the future. The sheer chunk it takes out of my executive function means I can't perform nearly as well at other tasks in life. The GLP-1 class of drugs make it trivial in comparison. Like a performance enhancer for a diet.
I also have worked out a hell of a lot more taking Tirzepatide than I ever did counting calories on a food scale. This is because I feel so much better it's not even a comparison - primarily mentally, but also physically due to the other positive side effects the drug has associated with it. Plus I don't feel guilty when I go out with friends to a burger joint - I eat half and feel perfectly satiated, no guilt or "cheat day" required. My energy levels are not comparable. I have much more time in my day available for other activities, such as keeping appointments with my personal trainer at the gym or taking 6 miles of walks per day.
Losing weight and maintaining an active healthy lifestyle doesn't have to "suck" any more.
I feel like you need someone who has gone through both experiences to actually have credibility in this conversation. Willpower isn't a special trait, it's not something to lord over other people.