That's unfortunately only true for old (100+ years) buildings, most newer developments don't have commercial space in the ground floor.

What are needed are more community spaces.

Parks, YMCAs, basketball courts, cafes, etc.

Anecdotally it feels like it should be more complex than that, as two of the three whose construction I’ve watched to completion since I moved here have ground floor commercial space.

I thought about mixed use (commercial on first, residential above) when I wrote my previous, and left it out, because it seems like a nuanced subject.

In that "Community spaces" is a subset of "businesses an owner leasing commercial space would rent to."

I don't think we're talking about a Subway sandwich shop on the ground floor being helpful.