The problem is, every time you use it, you become more passive. More passive means less alert to problems.

Look at all the accidents involving "safety attendants" in self-driving cars. Every minute they let AI take the wheel, they become more complacent. Maaaybe I'll sneak a peak at my phone. Well, haven't gotten into an accident in a month, I'll watch a video. In the corner of my vision. Hah, that was good, gotta leave a commen — BANG!