I feel like he addresses this quite well in the conclusion. In regards to cars, "this is not a new phenomenon" and admits to his reliance on salesmen and mechanics.

Ultimately, he's asking that the people who make decisions about how our world is shaped have some knowledge about the things that are going to shape the world. And that essential issue is still unaddressed. Remind me, how many years ago was it that US Congress was asking Google why the bad articles show up when you search their name?

Oh, and our car-centric society in the US largely sucks. That may or may not have anything to do with our general understanding of a motor, but maybe it's worth considering how much thought has really gone into the implications of these massively affecting technologies.