Unfortunately, Autopilot currently exists in the liminal space where it should just work... Unless it doesn't, in which case it's allowed to kick out with no margin of notice time and the driver is immediately responsible for what happens next.
It's entirely possible that is an unsafe-at-any-speed configuration.
It's sketchy at best. Our newest car does emergency braking and that's it. And it's good at it, only engaging when there is a situation it feels (and is correct) about me not braking in time or hard enough. I shouldn't have to worry about it failing.
That’s the point of a Level 4 driver assistance system. Tesla’s Autopilot is 2 while Mercedes’ Drive Pilot is 3 in limited areas. Waymo is an example of a Level 4 system, albeit very limited in geographic area.