At a systems level, transportation is something we have to be very, very careful about, because if you get it wrong, you start excluding entire groups of people from being a functional part of your society just because they are different from you in where and how they live.

"When that happens, choosing to drive yourself will be a selfish act, just like exposing people to secondhand smoke is now." Really? I drive on logging roads a few times a month to get to some property. This is pretty sketchy even in good conditions and there's always the chance of getting stuck and having to hike a mile or two the rest of the way up to go get the tractor and sort it out. I'm probably not buying a self-driving car any time soon, if ever.

Now, is having self driving taxis a fantastic idea in a very dense city? Of course. There's huge benefits in keeping the average car as safe, efficient in both energy and pollution, and highly utilized as possible. Are these also a good retrofit to dense-ish suburbs where a bus/rail network isn't quite enough (and the costs to build it in already-developed land are unpalatable)? Also yes. But that's not ubiquitous, that's just part of a larger system that needs to be able to serve all users.

And if your point is that "move out of the mountains and into a city because that's the less-selfish option"... that's a certain kind of political statement, I guess.