Emergency breaking will sure as hell kill you or at least the person behind you when you’re going 75 or 80 in the first lane.

I'm not a fan of Elon, Tesla, or "FSD", but for what it's worth, that's absolutely the fault of the person behind you for not maintaining appropriate stopping distance.

I would say less than 5% of people maintain the required 30-50ft of recommended distance needed to stop safely at those speeds.

The stopping distance required at 75mph is at least 250-300 feet, in optimal conditions.

Yeah that’s definitely not happening.

Then I guess they're not skilled enough to be granted the privilege of driving at those speeds ¯\_(ツ)_/¯

You can work backwards from this - the vast majority of people in the US don't agree with that statement. You might be able to get them there, if Americans didn't have to be as car dependent due to their built environment. But because so many people are already car dependent, it's hard to make those changes.

The one theory of change I think is approachable suggests allowing dramatic increases in density in places that are not car dependent - the people who live there are much more likely to agree with us, so letting the number of people who live there 10x or even 100x could lead to this kind of change you propose.