I'm NOT saying "people don't want to ride trains."
I AM saying "people don't want ride trains that allow 5% of the riders to smoke cigarettes on enclosed train platforms and in enclosed train cars."
You might says "what? but that's not happening."
In Chicago, yes it is: https://resphealth.org/snuff-out-smoking-on-cta/
People want transit as long as that transit reasonably meets their quality of life standards. The reason why automobiles have been so popular -- even while being wildly more expensive -- is exactly that they allow the user to adjust their travel to their optimal quality of life expectations.
Public transit advocates need to be honest with themselves that anti-social behavioral issues really matter to people. People are willing to pay more to have a more pleasant experience. When a transit system fails to meet that standard, then you'll suddenly find yourself with a transit system that people don't want to use.