I have had a coupe for the last 10+ years. Because I have no use for a full size sedan, and it weighs less so better mileage and handling. Plus I don’t want people asking me for a ride unless they need it enough to be uncomfortable in a tiny car (“sure, but I have a coupe” is a powerful line when people want a ride). It’s a Honda civic, which you’d struggle mightily to class with sports cars and muscle cars… so I’m pretty confused by your blanket classification - my civic coupe is nothing like the eclipse I used to have.

I’m a super cautious driver (no tickets no accidents 20 years driving) but I also basically never see sporty coupes around here (rural), so I don’t have any reason to assume coupe drivers are worse than sedan drivers as a general rule. As such, I’d be pretty pissed if I had to take a special driving test just because I don’t want a full back seat adding weight to my commute.

I’m with you on the rest of it, though I’d say to just ban large vehicles entirely unless you get special accommodation to have one for work purposes only. They are entirely unnecessary in 99% of cases and seem (anecdotally) to make people more aggressive drivers (I think because the height makes them feel slower), rather than just attracting aggressive drivers.