Think of it this way - once you're in a state of obesity, resolving that situation is quite difficult. Eating healthy may not be enough, particularly if there are other metabolic issues going on.
The imbalance of fat to muscle leads to insulin resistance. Insulin resistance gets in the way of weight loss. After a long time of trying other means, I decided to directly tackle the insulin resistance problem. And it's been the only thing that's worked.
Sorry - I think there's complexity with insulin at play that you're overlooking. When I did caloric restriction, I was constantly battling hypoglycemic events that made me not want to exercise. I don't get that with the GLP-1s. In online discussions, people tend to conflate GLP-1 with appetite suppressants - but there's also insulin stabilization that occurs.
I started a GLP-1 in October. I've been eating healthy and exercising for a decade, but I was still in the obese category and blood sugar tests indicated I was at the edge of pre-diabetes. If I pushed hard on calorie reduction or exercise, I could gain 10-20% improvement, but it seemed like that would always reverse itself when I'd hit an injury or got sick. I'm hitting my mid-40s and decided it was time for a drastic change. I could have continued yo-yo dieting or opt for a solution that gets me to a healthy BMI within a year.
I gained a lot of weight during puberty, coupled with a less healthy diet in my youth. I suspect many folks are in the same boat - by the time they realize they need to eat/exercise, it's too late. Their metabolic system has been compromised by either diet, hormones, genetics, whatever.
In four months on a GLP-1, I've dropped about 18kg and since I coupled resistance training, I've increased on various strength parameters. The sudden reduction in weight has benefited my activity level substantially. There tends to be two classes of folks - those who need to stay on this drug forever and those who don't - I'm hoping in the end I fall into the don't, but I'm going to let the data from my continuous glucose monitor decide that.
I highly recommend the book "Ozempic Revolution" if you're considering the pros/cons of this path.
The mode where it sits on a monitor and displays a status ("on call") is very interesting. I think that could be simplified into a product unto itself -- but it would need to priced at "office toy" level -- so around $20-$40 USD.