I wonder why are there so many people in this situation of obesity? I mean, really, what are the known causes? I get that we are all dissimilar regarding how m

I wonder why are there so many people in this situation of obesity? I mean, really, what are the known causes? I get that we are all dissimilar regarding how much our organism will assimilate and store this or that on the genetics lottery. My supposition here would be that, given the proportion at stake, the bulk of issue is more likely coming from a diet that should be improved. What would it cost to pay people with public nutritional education and prescribing a catch for a few months, vs these drugs? Once again, I don’t imply it could be panacea for every single case, and I humbly recognize my ignorance of the topic, so feel very welcome to point me to relevant resources.