Are these drugs not just changing the reward that is being chased, switching one shortcut to a reward pathway for another, same coin different sides, as you said , more to desire than doughnuts

They all have the "want it now" factor.

Definitely healthier eating less junk food for sure, but check out the side effects, from anecdotal evidence ( yes, small sample size I agree) these side effects are not as uncommon as we tend to think "side effects" can (or will) be, and that's just the ones that show up quickly.