Is it responsible to let users do auto speed and auto lane on a high speed highway without other autopilot features ?

Rollout both technologies at scale , and try to guess with one will cause more harm giving th fact there will be users in both cars trying to put legs on a steering wheel :

A stupid tech that will not even try to do safe things

Or software that is let’s say 4x less safe vs avg human but still very capable of doing maneuvering without hitting obvious walls etc ?

Legally Teslas are Advanced Driver Assistance Systems, while Waymos for example are Automated Driving Systems.

If you're driving a vehicle in the former category, you'll be on the hook for reckless driving if you aren't fully supervising the vehicle.

I'm pretty sure the original commenter was supervising the driving, though.