I think this is just the usual goal post moving, if a machine does it then we decide it wasn't really dangerous for a machine to do it.
Garmin Autoland will take a plane which is otherwise working and is in the sky and put it back on the ground because the pilot has a problem (e.g. your plane nut husband finally has another stroke† while taking you and the kids cross country, you've never learned to fly but you just press the button like you were taught and the plane will tell you to remain calm while it figures out where to land and gets itself back down). It isn't cheap (the system needs to control flight surfaces, engines, radios, brakes, more or less everything on a plane) and of course it can't fix a broken plane, but a random non-pilot is going to do a much worse job and "land an aeroplane" seems like it counts as dangerous to me.
> The thing is, if you have "partial" self driving, you might as well just drive yourself IMHO.
If you live in the relatively small service zone for Waymo, you just get in the car and it drives you elsewhere in the zone, like a taxi, except the car is driving. Waymo doesn't want you "partially" driving anything, it doesn't want you near the wheel or pedals, it would prefer if you watch a video or read a book.
† In some countries private pilots have to be fit, but the US has gradually decided that eh, it's your plane, your risk, the main obstacle today for medically unfit private pilots is getting insurance.