American here - this stuff is actually widely known and accepted among our progressives, who are the people most likely by far to leave.
We just get fucked out of political power at the federal level by the outsized representation of small-population, rural, die-hard-conservative states. For example if the presidency was by popular vote we likely wouldn’t have had a Republican president since 93 which would have made the supreme court liberal by 8-1.
At the most fundamental level, the US political system just wasn’t built to handle the increasing rural/urban population disparity, and at some point things will need to change. What that change looks like is anybody’s guess. One scenario is that with the economic failure of the backwaters, plus the housing crisis and additional automation, it becomes economically feasible to just build/buy enough housing in the backwaters to be able to have a controlling share in the vote. Which obviously sucks in a lot of ways but it might be the solution with the lowest barrier to entry.
But there is also no need to invoke “freedom of speech” if the things you’re saying are unpopular and many people are offended by it… unless the government is trying to stop you from expressing those things. If people are asking the bouncer to chuck somebody out of the bar, that person might as well invoke the third amendment against quartering soldiers in their house because that’s exactly as irrelevant to the situation as the first.