Driving isn't realistically a personal choice. Roadways designed for cars extend from every single point in the country to every other. The support for alternative methods of transportation varies greatly by area, but is generally poor.

Riding a bike or taking the bus is objectively the worse option for most people. That's not personal choice, that's policy.

Reversing course for a car-culture country like the US would take 50+ years. If it's even possible, which I personally don't think it is — the US is too far gone.

To an extent I agree with you. Some places and lifestyles (e.g. means of earning a living) don't make cutting back on driving a viable choice.

However, these things can and do change (introduction of public transport and saner planning allowing local shops and the possibility for children get to and from school autonomously for example).

One problem as I see it is that many people that don't have a viable choice other than driving everywhere are politically opposed to structural change. Adopting this political point of view is also a personal choice.