I think it is much less that people are opposed to self-driving cars as a concept, just that they are skeptical of their current efficacy, and even more skeptical of what many of the current competitors in the field self-report their efficacy is. I for one am skeptical of many current claims that self-driving cars are eminent, and would like a greater regulatory setup to confirm that self-driving is in fact as safe to safer than human driving, and in what instances that is not true. In order to prove that to a statistical significance, you are going to need many many miles, which we should force companies to do in the effort of being cautious.