I don’t think non Boomers are any better about it. When push comes to shove, everyone wants their kids to go to school with other kids whose parents earn as much or more, so the situation will tend to non dense housing as long as there is a wide wealth/inequality gap.

The root cause is technology obviating many jobs and letting labor from around the world compete with the same labor in the US.

Obviously if middle class people live like kings in the US compared to 90% of the world where people don’t have single family homes with garages and two cars, then there exists a tremendous arbitrage opportunity which will have to be taken advantage of if a business/country wants to remain competitive globally.