This might be true in rural Texas, but it's certainly not true in any of the major cities. People do crazy shit all day long and no-one bats an eyelid at it.
Transit looks worse just because the people most likely to do that have 'mental issues' (possibly drug caused, but there are other causes) that also mean they can't keep a job and thus can't afford a car. However even then they are a small minority that you see because you are paying attention not because it is very common.
True.