You're ignoring the economic choices not taken.
The investor capitalized the builder, and the builder constructed the housing, and the lender capitalized the landlord, and the landlord bought the building, all because they knew that people need to have a place to exist, and that the spot they picked was a likely spot.
If renting were somehow not allowed, none of them would have any use for that spot. There would not be that same building there, but there is the possibility that there would be a 12 bed + 1 outhouse shanty/bunkhouse there instead, which would also be better than sleeping in your car, but only just barely. And the cost of your kip would be much less.
There is also the possibility that instead of just one 3200 sq.ft. house with grass-covered yard, there would be a low-rise tenement-style condo-plex with 8 units at 1600 sq.ft. each, with limited covered parking and no lawn. With enough of those on the same street, there might also be a bus stop nearby, and competition among local utilities.
But by defining that plot as one place for one family to live, the landlord and his financiers has ensured that no matter how big it is, it is too expensive for the renter to easily buy it. If the landlord did not exist, that plot would have to be divided into as many places as is necessary to bring the price down to what those who will be occupying those places can afford to pay each other to stay out of someone else's spot.