[T]he US has a population density that makes GOOD public transportation economically impractical. Yes, there are buses here in Lexington (pop: 270,000), but the buses suck. Yes, I *could* take the bus, but I'd be turning a 15 min trip into an hour and half, each way. Maybe I don't have an excuse, but some people have shit to do. They need to get home to their kids and so on. I understand why they drive.
Oh, nobody's denying the short-term convenience of cars. The question is whether it's worth longer term cataclysm or whether you still get to say you are a smart or good person if knowing what you know you prefer the short-term over the longer-term.
I suspect the good people of Lexington could organize and agitate to get better bus service if they got off their asses and decided to give a shit about destroying the world their kids have to live in, if, as you say, they have kids and such.
But, yes, of course, people have shit to do. Not me. I have used for decades and continue still to use public transportation even where it was and is crappy and turns 15 minute commutes into hour-long commutes because I am a special magical being who doesn't have shit to do.
Or maybe I just brought a book or graded papers or organized my day and learned soon enough to enjoy or otherwise make use of the "burden" of that unspeakable inconvenience and discovered soon enough that it wasn't one. Again, tho', I'm a special magical being utterly unlike normal folks with their urgently demanding indispensably lightning-paced fantastically satisfying lives, as has been amply established already.