This is all true, but one problem that is not widespread is cars strewn all over the sidewalk. The aesthetic problem that you mention is indeed minor; the accessibility problem for people in wheelchairs is not.

Cars have all the problems you’ve mentioned and more and I’m also dissatisfied with how much public space we’ve set aside for them, but they also mostly stay off sidewalks and wait at street crossings, so at least we’ve also set aside space for pedestrians to get from one place to another that is usable even for those in wheelchairs.