Which is just worse.
When I'm driving I know what I'm doing, what I'm planning to do and can scan the road and controls with that context.
Making me have to try and guess what the car is going to do at any given time is adding complexity to the process: am I changing lanes now, oh I guess I am because the autonomy thinks we should etc.
Sure, but the practical experience is that FSD is fairly predictable. It's just a matter of personal preference that comes from experience. I wouldn't impose a system like FSD on everybody.
Not sure about your car but the car I have with augmented cruise requires hands on wheel. Turns off otherwise. (Volvo XC90)
I agree that there are situations where what I do as a trained driver is different from augmented cruise.
A good example (or perhaps I'm wrong) is this: in a lane, car pulls into lane in front of me and between the car further ahead. Now I don't have enough space in between me and that new entrant. But instead of using brakes (unless eggregious), I bleed speed until I make space I want. Augmented cruise doesn't do that - it hits brakes.
So, from behind, I think it looks like I'm using my brakes a lot more than I am when on augmented cruise. And excessive brake use distracts the driver behind me.