So old people who’s kids have left never have kids come back to visit, or grandkids, or a 30+ lb dog?
I also think that this is another corrective action problem. The benefit to everyone from having most carsm in our cities be much smaller would be huge, but the inconvenience from having a smaller car is the thing an individual can control.
Again, there are legitimate use cases for a lot of this. Some people even need a semi ;)