Pricing the masses out of cars, taking away their personal mobility is not a social or technological advance in history it is a regressive step. Society going backwards.
I don't understand why you think this will happen. Personal mobility does not necessarily depend on owning a car.
As a general view (excluding all outlier cases, of which there will always be a few) personal mobility just requires transport to be available at the right time. Privately owned vehicles are seen as the most convenient as they are always available to you. You may see busses as the other end of the scale, as you share it and you have to plan to meet its schedule. There's a cost, convenience and possibly time balance that apples in both cases. What we want is the convenience and timing of cars without the high cost and other issues associated.
As an example, taxis are a compromise between the two. What you want is a personal on demand taxi that you pay for only when you use it.
Who can argue with a system where a vehicle turns up at exactly the time you want it, takes you to where you want to go, drops you off (no parking issues), then picks you up exactly when you want picking up, takes you home and then goes away.
Exactly the same convenience as a car, but without the capital cost of buying it in the first place, and no need for maintenance. In fact its even better than having a car, because soon, not only will you have to buy the car, pay the annual road tax, and pay the tax on the fuel but you will also have to pay per mile anyway.
Such a system, as well as requiring self driving cars, also takes away all the emotion. It does depend on you not wanting to own a car. Personably for most journeys, I don't care about what vehicle I'm in. However, I can also see the attraction of driving eg a classic for the fun of it. Like all these things, it doesn't need to be all or nothing. Society changes slowly. Give people the choice that meets their needs and they will choose it. Legislation does encourage and inform the choice though!
I know such a system isn't here yet, but here is no reason why it couldn't come in the next few years - around here we have these pay per journey electric scooters that are very popular. They weren't here a couple of years ago. Change happens, driven by need.
Its the faster horse argument again.