If given a choice between changing from what you are used to which has drawbacks, to something new that has drawbacks, even if those drawbacks are markedly mild

If given a choice between changing from what you are used to which has drawbacks, to something new that has drawbacks, even if those drawbacks are markedly milder, almost everyone will choose to stick with where they already are. Consciously choosing a position which has drawbacks that you know about makes you feel personally responsible for those when they occur. That is infinitely worse than suffering the drawbacks of the "default" you stay with which you can give yourself a moral pass on because it wasn't a situation you chose to begin with. There's also the issue of what a self-driving car could do... and what they WILL do. Much technology COULD be amazing... if companies did not function in the ways that they actually do. Because of that, technology often fails to meet any of the promises made. Development is supposed to be cheap and fast, and safety and security get left at the door. No company is held liable for such things, and it would be expensive and bothersome to fix, so they're not about to bother.