Middle class and minorities in Altadena don't want to raise their families in Soviet-style apartments because some hipster urbanist thinks its best. They want SFH, that's why they live there.

Using those buzzwords really doesn't invite much of a conversation, even less when it's basically strawmanning from your part. Still I will bite a bit...

There are many examples of places around the world who managed to intersperse SFH with medium-density housing (3-4 stories apartment buildings) so it's not an either-or situation. For example: many suburbs of Stockholm have developed this way, it allows options based on people's budgets and needs, while also creating enough density to attract local businesses so people are not entirely car-dependent for basic necessities, creates third places for meetings, etc.

I'm preaching to the choir though, I do understand you will probably never understand or see it that way given the vitriol you started with. It's quite sad because there are other ways for a community to live that can cater to different needs where mixed-housing exists while also making these neighbourhoods more interesting and livable in themselves.