We've been making motors (electric or combustion) for over a hundred years, and gotten pretty damn good at making them safe and reliable. Same thing with stoves, HVAC equipment, small appliances, etc. These are all mature technologies that we can practically trust our lives with.
Internet-connected smart vehicles aren't a mature technology. Not in the sense of this being the win2k era of that tech, but that our assumptions about how to build these systems might be fundamentally wrong. I don't know if it will ever be safe enough to trust human lives to it.
Until then, I'll only want to buy cars made before 2010.