You describe some of the best possible transit scenarios and compare it to the worst possible car scenarios. That can easily be flipped.

My daily experience with transit is that you're far more likely to be standing, jam packed like sardines with your nose up someone's armpit. The train/bus is constantly heaving and shaking. You have to be always be concentrating not to stumble or fall into the person next to you.

This is a problem that still exists with some of the best transit systems, and is even more pronounced on the ones that aren't quite so nice.