These are not autonomous vehicles by any meaningful definition.
The industry defines 6 levels of autonomy, from level 0 (none) to level 5 (can handle anything a human driver can). Systems like Tesla's "autopilot" (and similar from a couple other manufacturers) are level 2 on this scale, which is basically "glorified cruise control" (driver can disengage from wheel and pedals simultaneously, but must monitor continually and be ready to take control at any moment). In other words there are
no conditions under which safety critical functions can be wholly delegated to the vehicle at this level of autonomy (if that's possible in some conditions you reach level 3).
The problem is that at least some people owning such vehicles seem incapable of accepting just how limited they are. Some have suggested that marketing names like "autopilot" don't help people appreciate the limits, and certainly there's a "tension" between what companies say when thing go wrong and the impression that their marketing gives of the system's capabilities.
So should systems at this level be banned? I think there are two possible arguments. Firstly that this limited level of competence will tend to promote disengagement of the driver despite their constant attention actually still being required, even if they intellectually understand the limitations. And secondly that a sufficiently large number of people will not be capable of judging the system's competence accurately: they'll see it handle a few simple circumstances fine and will overestimate its capabilities, however the limitations are explained to them, because their experience is the things they see it do and they've no way of appreciating the many ways in which its limitations can manifest.
Personally I don't think I'd want anything less than Level 4 (capable of managing an entire trip fully autonomously), so I'm quite open to systems like this being taken off the road. Though if we can find a way or removing distracted/angry/impatient/macho drivers I'd still give that a higher priority
(though the two are not exclusive).