This doesn't make sense to me. If single-family homes are what most people want, why would a developer bother to buy up land and build something denser if people don't want to live somewhere denser? That sounds like a dumb business decision.
Nearly the entire country is zoned for single-family housing. Someone who wants to live in a SFH has no shortage of options. Meanwhile, someone who wants to live somewhere denser has very few options; we've almost entirely banned building new ones, so what dense places do exist are mostly the ones built prior to modern zoning codes.
As a result, people who do want to live somewhere denser often aren't able to, despite the demand. The data backs this up: https://cityobservatory.org/the-myth-of-revealed-preference-...
So when you get densification in US cities, it happens in districts that were formerly industrial/commercial only - where people aren't giving up the form of their existing neighborhoods - or in poor areas with little political organization.
(There's also a TON of underutilized land in industrial/commerical only districts in most US cities, so the focus on single family home zoning when all those lots are already there and similarly "underutilized" is foolish. Even if you abolished zoning overnight, a big industrial or commercial property is going to be much easier to acquire than a bunch of individual home lots.)