No, I went to school (k-12 and later, uni) in the bike friendlier upper-middle neighborhoods but your observations do stand. Every neighborhood is different. I do teach in both downtown and in the mountains, too, although in the later one kind of has to drive because it's both very vertical and very narrow roads so it's basically suicide to bike there.

In Santa Monica, you do see much of what you're referring to plus their city is heavy in anti-car for eco reasons. I heard from someone at city hall that they purposely reduce parking in venues to encourage biking, so even during rush hour you'll see electric bikes pretty regularly-- even going to surrounding cities since they made driving unbearable.

In Orange County, you don't see the same trends... but Irvine, where I attended grad school, is a planned corporate community with extra wide roads, lots of parks, and man made trails. Biking is strictly a recreation to them, and 90% of the bikers I saw on trail were grey hairs with extremely expensive bikes zooming way faster than my used mountain bike could ever go.

Somehow, though, my neighborhood with none of that still has so many more bicycles and walkers than either of the places actually trying to encourage biking. Necessity is simply going to beat desire, even for people who prefer biking

100% is always higher.