You take half the land left in the county for construction and build 5 mil mansions with ridiculous garden acrage instead of more affordable houses. You've now constrained yourself in the number of affordable homes you can build in your county in the future, as land is finite. Maybe you took a few k's off the 10 mil mansions for a short while. Congratulations.
We only build high-end housing in CA because it's wildly expensive to build housing at all. It's especially expensive exactly because the cost of the "affordable" (subsidized) housing that is required for most of these developments has to be passed to the home buyers, not the general public (who should be funding subsidized housing), which means the housing will be wildly expensive regardless.
Again, the idea that building "high end" (market rate) housing does nothing is just wrong. It's part of an approach that honestly deals with the problem of public housing funding, as will as market rates. The if we want the market to start producing housing for the middle class (and we should want that), we'll need to make it inexpensive and accessible to build so that normal people can redevelop their homes, we take the delta in property values, and use that money to fund public housing for those people most in need.
Not sure anyone said this. The parent said it does nothing to solve homelessness and unless the homeowners are housing homeless people in their mansions, I think they're by and large correct. And you still have to contend with the luxury homes taking away future building potential by occupying a ridiculous amount of finite land that a county has available.
People call it a housing crisis for a reason. You don't solve a crisis by championing something by arguing "hey, it's not nothing" anymore than you would attempt to solve a famine crisis by dripping a couple of drops of water in a few malnourished kids' mouthes.