All you're saying is that the people around you are middle class professionals participating in suburban and exurban flight. That's a particular demographic pursuing a particular thing.

But there are many other people (even with families!) that like living in dense or even vertical communities with lots of proximate commerce and culture, people who would rather live in the lively urban community they grew up in rather than on a isolating cul de sac, people that appreciate not having to direcrly maintain as much, etc

I beliece that "the only adults you know..." feel the way you describe, but you might want to take that as a sign that there are many other adults for you to go out and meet. They can be so different than the ones in your bubble and might even inspire you to look at your own life less rigidly!