yes its not worth risking it. Think of it this way the total weight of your car (and your life) is only touching the road by 4 spots on average 7inx4in. Its just not worth risking your safety and others because you were to cheap to spend 500 bucks for tires
I think Michelin still makes those collapsible spares. But it doesn't matter it is called a temporary spare for a reason.
and Braap Im glad you and your family didnt get hurt. That could of turned out reallybad