Not saying this would happen but let’s say the delinquent renter wasn’t responsible and unfortunately there was a fire and the residence was no longer habitable. I guess the homeowner could recover from the insurance and could rebuild.
Of course the delinquent renter would have to go somewhere else and would hopefully have renter’s insurance to cover any of their losses.
Wait until the renter is gone for the day. Carefully break in and change the locks. He can’t do anything to a squatter. He’ll have to evict you.