These mortgages were transactions where the risks were clearly stated. It’s a loan. If you can’t pay back a loan, that isn’t the fault of the lender. And it certainly isn’t the public coffers that should come to rescue you. So if I go to McDonald’s and order a coffee, but I don’t have my wallet. I should be ok to just take the coffee and defer me paying for the coffee indefinitely because I can’t afford to do so? I mean, McDonald’s has been making billions of dollars a year, surely they can start giving away the product for ious with no due date.
Meaning that, yes there are some situations that can be considered to break a contractual obligation, however, it means that the person taking on the loan needs to repay the principal. If you break this down and forgive it all, you do understand how that would completely break any motivation banks have to loan money at all.