That makes no sense. You got your mortgage. You got your house. It's not like anyone is calling your note. No one is taking your house. No one is accelerating your debt on your old notes.
On the other hand, if no one could get a new loan, it would be harder to sell houses in the future. People might drop their asking prices in order to sell their houses sooner.
But that would be a tight money environment, not an easy money situation.