I believe a piece of it that real solutions a)take a long time to come to fruition (often decades - solar power was proped up by subsidies for a generation before it became economical on its own) and b)have costs (eg making housing more broadly affordable makes it a worse investment) and many people aren't going to take that shit. Solutions next year at no cost (or only at a cost to "other" people) or die.
So any politician who proposes real solutions that can work can't get votes. Politicians who propose fantasy solutions get voted in over and over, because even when their solutions don't pan out, "at least they are trying."
The examples you give aren't popular enough, in enough right places (since legislative representation is uneven) to get the 60 Senate seats of support required to make them law. At least in part because the donor and lobbying class opposes them as currently framed, but enough voters are swayed by donor-class-funded messaging to prevent voting in sufficient supportive legislators.