People are irrational and do make stupid decisions, there's a ton of good science saying so, and there are good scientific explanations. We can't run 50mph and we can't not like high-flavor calories. No blame attaches - human nature is what it is. Equally, we are vulnerable to peer group norms and asymmetric treatment of opt-out versus opt-in. Again, science.

Connect those, and you get a way to manipulate humans into doing nonstupid things.

Should you do that? That's a question ethics, and maybe politics.

Can you? That's a question for science, and the answer seems to be yes.