Except: Cell phones. All of these things could have been said about cell phones (or other technologies), and we have dealt with them reasonably when they came up. Self-driving cars are an incremental step. Think of them more as an above-ground subway, and I think you are closer to the truth of the matter.
Smartphone do have negative affects on society, they allow constant surveillance and due to their efficiency it's harder and harder not to use one.
An incremental step to what? New technology brings with it the potential to cause serious social problems. I think most of the serious potential problems associated with self-driving cars have been overlooked by most people interested in automation. I think that serious consideration should be given to the negative implications of this technology. I don't really think that the potential problems which I have raised have been seriously addressed. Most of the ethical discussions surrounding self-driving cars seem to be concerned with who should get squished. When it seems to me, the questions of "Who should have control over the fleets?" and "What sort of consumer rights acquiescence is warranted?" are far bigger problems. Also, I don't think cell phones are a good example of reasonably dealing with techno-political problems. Today, cell phones are a part of the massive-passive surveillance infrastructure which governments and their corporate partners have been diligently building for the last 20 years. Very little has been done to address that and that has serious implications for stable liberal democracies.