The more common public transit use by the general population the more you dilute the fringes of society with normal people. There’s vastly more normal people than people on the fringes of society but if it’s normal for people to drive then that’s what normal people will do. Lots of normal people also tends to enforce social conformity.

You see the same effect in any pace where the general public visits. Walmart at 6pm is a very different place than Walmart at 3AM not because the store is different but because you’re self selecting for people who don’t need to be asleep at 3AM.