I'm not saying we should ban stuff.

I'm saying that we could enact policies that encourage better habits by default. For example, we don't have to build car-dependent suburbia. Car-dependency is a choice we made. We've largely outlawed the building of walkable cities through zoning codes. There are literally millions upon millions of people who are forced into car-dependent suburbia and stuck with 9-5 jobs where they have to spend 1.5 hours commuting. It's no wonder people find it difficult to exercise. Add kids into the mix and it becomes almost impossible to find the time to drive to a gym to exercise 5 days a week. Many of these suburban cities are openly hostile to people not in cars.

That whole thing I just described is a series of policy choices. We can't save people from themselves but we can encourage better lifestyle choices. People would walk more if there were more stuff to walk to. People would bike to work if it were made possible.

Also, honestly, a world with fewer cars would be a much better place.