>costs for those drivers very expensive because they're driving among automated vehicles which increases consequences of bad driving.

Or very cheap because the people who self select to drive will be the people who care enough about driving to not do things like text and drive and when they do slip up the machines around them will prevent it from causing problems.

>shunned as a socially unacceptable risk like smoking.

Among the middle and upper class in Bubble Valley maybe. Everywhere else it's more of a "you do you" thing.