The main benefit of having a car is that it's right there the moment you need it, you can take it as far as you need to and you can load it up with whatever you need - none of this applies to waymo or a taxi without getting too expensive.

And saying taxis are like public transportation, because another person is driving you, is going in favor of OPs point out people here being out of touch.

There is still a slight difference between having to take a packed subway between A’ and B’ (while you’re trying to do A->B) and doing A->B in a car of your own with a driver you don’t know.

I'm not sure that reason is all that common. People like cars primarily for the flexibility I think.