You're out here saying 640 sqft ought to be enough for anyone.
Cars are bad, you see, and therefore, let's pick some irrelevant problem (parking lots), and conflate it with housing issues.
First, most places have zero housing issues. Mostly, certain tiny areas(with large populations) of California do, but the rest of North America has no shortage of land to build on.
And unlike California, most of the world doesn't seem to have issues with zoning for new builds.
In fact, in most of NA housing is quite affordable, with the exception of a current bubble, which exists due to COVID issues, a once in a century event.
This has only been going on for a year or so, and is already starting to cool.
Californians: a note. Your issues are not nation wide.
Others: stop trying to solve other pet peeves, by conflating issues. I assure you, you just end up sounding uninformed.
It has nothing to do with "cars bad", and everything to do with "why are we letting all this precious resource go so poorly utilized?"
You also act as if there is a land shortage. There is not, with exceptions stated above.
If my objective is "maximize housing" then step one is too evaluate the space and find areas where housing does not exist in quantity.
Those are places like parking lots, parks, commerical only buildings, single family homes, hospitals, schools, etc.
To increase supply, we must tear down existing sites. Parking lots have the most limited positive upsides.
Where would you build a new, 1000 unit apartment building downtown?