The issues you listed seem intractable in the U.S., and the current NIMBYism towards data centers seems likely to make NIMBYism towards housing even worse - a number of the same arguments that were used against housing are now being used against DCs, but we’re seeing a whole new level of NIMBY tactics being tried out - I expect we will see similar city-wide/county-wide bans on multi-family housing, mass transit, mixed zoning, etc - or use of eminent domain to block housing projects, etc. if this kind of NIMBYism becomes accepted or even celebrated against DCs.

Or for your suggestion to “fix healthcare” - how and by whom? The solutions that those on the left push are anathema to 1 of the 2 major parties in the U.S., and the party which currently controls all of the branches of government.