If the driver is doing their job and properly babysitting the car against these sorts of mistakes, then driving in FSD mode will be more exhausting than normal driving.
I've heard it described as being like a driving instructor, watching a very inexperienced student who mostly drives fine, but is liable to suddenly make extremely poor decisions.
I think it would be much, much worse than being a driving instructor. When I teach my partner how to drive, they announce their intentions, act cautiously, and make clear what their next moves will be.
What I'm seeing here is more like teaching a chimpanzee how to drive. It's irrational, has no clear intent, and does not ever announce what it's trying to do.
I've never been in a FSD-beta car, but I would take a novice adult driver over that every day of the week.
I've heard it described as being like a driving instructor, watching a very inexperienced student who mostly drives fine, but is liable to suddenly make extremely poor decisions.