They want housing they can afford, to be built at a cost they can afford, with raw materials and labor they can afford. And they want the career paths and successes and joy in life that the people before have had.
Unless you somehow declare that they can't have access to the same standard of living as you who came before, they're going to be paying for and competing for the same resources in the places that provide the best jobs and futures. And if the lame answer is "well you just got here later than I did" they're going to be very unhappy with it.
There is no "why can't we just keep everything the same". You cannot keep the lid on that boiling pot forever. And that's just the US. Think of the billions of people waiting to join that ladder.
If they are all 0 years old, it doesn’t affect housing until about say 20 years later. If they are all immigrants over 20 then it does immediately. Demographics matter. Population growth in 2000 was about 1%, which is a lot more than your current 1 per μ annum figure.
Price of housing in VHCOL areas like the Bay Area, Seattle, and NYC is driven by the price of land. Price of housing in LCOL areas like Houston and the Midwest is driven by construction costs. You can always find more land in suburbia; the biggest expense is the cost of building a house on it.
The problem in California isn’t land, it’s politicians.
You mean the voters who vote for the politicians that do what they want vs. not vote for the politicians who would do what others would prefer? It is no secret that politicians can't act unilaterally or nefariously without being unelected at the ballot box.
I guess you consider taking the walls apart and completely rewiring the entire builting to be just "maintenance"? Our permitting department would disagree.
Almost every other rapidly growing state is complaining about the same problems, so it isn't "Californians", and I don't think they are astonished by the impact. Those that want to live in a zone-light place like Houston Texas have already moved.
Zoning and empowering NIMBYs with the ability to block construction is the big differentiator.
California property market is a full on casino."
It sounds like you answered your own question - not CA. Pretty much any lower density area is better. Small cities and rural areas tend to be cheaper, where materials do constitute the largest cost (or second to labor) of building.
And those two Californian metros still have plenty of sprawl, people realized they could keep building out a long time ago. Housing in Lancaster CA (about 1 hour from LA without traffic) is much cheaper than LA, though still expensive.
Once you factor out land value the cost to build per sq ft is similar.
California property market is a full on casino. When you buy here all you're getting is a leveraged bet that you'll be able to sell it for more to a greater fool. It has nothing to do with fundamentals especially not the cost of materials.