If a property is uninsurable, it can be bought for cash. The actual land value can still be mortgaged, too.
Would you want to hold collateral that has a high risk of becoming worthless? You would effectively be self insuring it and would have to price that into a loan you offered.
> Would you want to hold collateral that has a high risk of becoming worthless?
Of course not, the problem is that all parties were a-okay with the purchase in the first place, and the banks are trying to change the terms when they realize their hand is a losing one after many turns of the game. Sometimes that’s life, and the corporations should be forced to lose instead of changing the rules so the homeowner loses instead.