My brother-in-law is a blue collar man, he has a high-paying job in road construction and also owns a number of rental properties. He does most of the work himself so if a tenant has a water heater blow up he will replace it himself, he has friends who owe him favors so he can get low-cost help too.
If you are flipping homes yourself you will do it on the same basis and work for equity. If you are a corporation you're going to (1) have to hire people to do the work, and (2) probably hire some supervisor to drive around in a $90,000 truck to watch the first group. They all get cash before you do.
The individual home flipper working out of their own money is going to only choose projects that look very favorable. The corporation is going to hire a manager and that manager will probably be told to close a certain amount of deal flow and will feel pressured to close deals that aren't very profitable and not have such a financial incentive to keep the deals profitable.
I suspect a lot of the properties that were bought were bought to fill some kind of goal for the period rather than they having profit potential.
The better investment is buying, renting and then selling a decade later. The idea is that the renter pays the mortgage and other expenses for the property. But that's too long for most companies.
And "we are geniuses at 10,000 feet!" financial industry schemes, especially ones in cyclical sectors, have a strong tendency to scale up as the tide is turning against them.