This seems so uncontroversial I don't know why we haven't collectively decided to implement it. Though I get that the folks in power probably don't support it. We could easily decide that law enforcement data gathering warrant requirements are not so simple to circumvent. Maybe we should largely abolish third party doctrine.
Americans (citizens that is) have held fairly consistent opinions on healthcare, guns, education, war and yet very little changes because all voices are in fact, not equal. We are not collectively deciding. There are massive thumbs on the scale, often in favor of private profit that keep things as they are now.
Some might even, surprise surprise, be owned by the companies investing in the companies that use this technology.
This is, as the OP noted, a gross invasion of privacy and not avoidable in a country that largely requires cars and their registration for day to day life.
I agree. The problem is that we do not decide collectively on issues, we decide on representatives. And while a supermajority might agree, for example, that single payer healthcare is good, they may not all prioritize it the same way amongst a number of issues they are concerned about. And in the end, they get a very limited number of candidates to choose from, none of whom are likely to 100% match their priorities and choices.
So the politicians focus on the few issues that really will get people to pull the lever for them. Abortion being an obvious one. Health care doesn't have a strong enough consensus and priority combo to make it happen.
We have? That’s news to me on all three topics.
The bubble of Americans an individual commonly associates with might have fairly aligned opinions, but Americans as a set don’t hold a consistent/aligned opinion in these areas IME.