1. "It is a cure" - no, it isn't. Once you're off them, you're likely to be even less equipped for maintaining energy balance than before. So you need to stay on them, either for life or until you are really able to rework your own habits and overcome that 10(?) year period where the body is frantically pumping chemicals into your bloodstream that signal to get back to the old body composition.
3. "It is for obese people" - no, it is for everyone who struggles with energy balance in their diet. The relative availability and affordability of food that stimulates overeating means that these drugs are for a huge part - probably the majority - of the population.
Exercise and sleep have even better benefits than glp1 drugs, but that is not an argument against them.