That isn't what I'm saying.

I'm saying it was a reasonable hypothesis that "you're going to have a bad time" with a system like Autopilot, because of the vigilance concern you're referencing. But there is clearly more at play than vigilance, because it's not shaking out that way -- Autopilot (and similar lanekeeping + adaptive cruise systems from other manufacturers) aren't killing people left and right.

So, I was sharing my own hypothesis for why that may be: that the benefits of reduced fatigue are outweighing the drawbacks of distraction and complacency.