Unfortunately, as a population our intelligence is questionable at best. Municipalities have laws, first responders have flashing lights, cars have legal warnings, AP has "wheel jiggle" reminders, but a large number of people will STILL do what they can to push beyond the limitations of the system. Law enforcement agencies around the country have been issuing text and drive tickets en mass for over a decade now, but plenty of drivers would still rather risk the $200+ ticket than to just be safe and courteous on the road. To say nothing of drunk driving. These are ongoing battles and the govt should not let up. So yes, I agree with you that for the AP abusers, they should absolutely be held accountable for the damage/injuries they cause.
That being said, I don't think it's dumb for the govt to investigate in order to fully understand the scope of the problem, including AP limitations and how and why users misunderstand or abuse AP. This is going to be a bigger issue as AP is now widespread and Tesla vehicles aren't just driven by Tesla geeks, but also mass consumers who don't research the hell out of their cars. I see this issue the same as traffic engineers that have to redesign a dangerous or high risk intersection. If there's one intersection in town that has more crashes than any others, then it warrants an investigation into why, and what can be done about it.
Caveat: I like Tesla, I think they make decent cars. But I am not a toxic fanboy who thinks the company can do no wrong. I'm just a lowly shareholder. They're a company run by people, and all people make mistakes from time to time.