It's actually a little concerning how your line of reasoning seems to follow the most dystopian path, can't you see any other way of it happening?
"Airplane tickets are too cheap" is a talking point of French politicians recently. It's likely they will do something about it.
The EU already has a law in place saying no more regular cars can be sold starting in 2035. Of course, with a nice exception for Ferraris.
These dystopian things are happening now, I'm not imagining things.
Banning them all would make my life difficult in many ways, but there would be some really huge upsides.
You can live in Mackinak and try out the no car lifestyle. Watch out for the crap and piss in the gutters. https://www.michigan.org/city/mackinac-island