The problem with that is large scale economic forces. Sometimes there is not much opportunity "supply" so the price of an asset is wildly bid upward and it seems immoral to not permit the owners to keep their windfall. However fundamentally everyone's about the same on average so the bidding process is really a selection system to award the asset and the obligation to fund the loan payment stream to the least financially responsible "winner". There's some economic term for this along the lines of auction winners dilemma. The guy who lost out in the bidding last place because he was only willing to pay $200K is ironically the guy most likely to pay the bank back its $200K whereas the "winner" who bid $400K to win is incredibly likely to default. Then add a bunch of social engineering such that we all earn equal chance at loans from a bank, and the inevitable result of a system with a pinched supply is the only people earning assets are the people very comfy with screwing the bank and people not willing to screw the bank are going to be eternal renters or homeless or otherwise asset free. So supply weakness freezes the people most likely to pay the bank back out of the economy. Then when it collapses, get the government to bail them out because who can imagine modern life without banks taking their cut?
Just saying, bubbles / relative lack of supply times are a really bad time to be a moral and ethical purchaser. You're either not gonna win and a crook will win, or you'll have to become that crook who willfully screws the bank.
Meanwhile centrally controlled low interest rates mean money is sloshing looking for any return, any. Everything higher return got financialized. So loan money is going to be aggressively thrown at those willing to take out large loans and pretend they'll pay back. A flood in the money supply due to low interest rates gets the same result in the long run as a pinch in worthwhile asset supply.