It’s bad because it’s dangerous. If something happens and you can’t pay the mortgage any more, then the idea of a mortgage is that you can always just sell the house to settle the debt instead.
If you get into negative equity though, then even if you sell the house you could owe a huge amount of money and have no way to do anything about it. An under-control debt could turn into a crippling debt overnight.
I suspect the real reason politicians care, though, is because that’s the one scenario in which the lender might lose money. They prefer their customers being able to pay their debts (theoretically)
You understand that they were at war for a long time before they managed to sweep Assad and his forces away, right?
The final sudden advance may have come virtually overnight, but they’ve been fighting since the Arab spring in 2011