> But while they might say they like those benefits, most people will choose the benefits of low density living,
This is heavily dependent on one's conditioning. I grew up in a late mid-century low density suburb - nothing like the exurban sprawl you see today, but still very far from walkable. I instinctively moved from that to high density older neighborhoods as an adult.
At least at the moment the trend tends to be towards demand for the benefits of increased density, as the culture has shifted to valuing experiences more than large (expensive-to-maintain) spaces.
However, with the old and still vibrant urban neighborhoods now priced out of reach for most, people who are seeking the benefits of urban living are attempting to densify first ring suburbs, which is leading to intergenerational conflicts in many suburban city halls.
> Not to mention the benefit of being able to segregate children into different schools by socioeconomic status, by restricting different incomes from living in the same school district via zoning laws requiring large lots and expensive properties, which also leads to unfeasible public transportation.
I agree that these factors are all present, and are usually enabled by planning and zoning rules, which often function as a replacement for the illegal racial neighborhood covenant system that used to be common in the US. IMO the current system is a shame, but I'm also aware that the system is working for the subset who can afford to exist on it's beneficial side, and those people tend to vote in local elections.