I agree with your opinion, but the other way to look at it is that most fat people know they are fat, "want" to do something about it, but just don't because losing weight is really hard, from a human level. Millions of years of evolution are working against you to lose fat stores, because 99.99% of people who have ever done that starved to death.

If sketchy drugs are the only ACTUAL way to get the 3/4ths of the country to lose weight and be healthier, shouldn't we try it?

Though, the end result of that is probably finding out that if you are a "healthy" weight from drugs, but your diet is still mainly mcdonalds and steaks and food made mostly of butter, you probably will have just as many health problems. And there's no exercise drug.