Not always. Depends on the 'breeder'. But if you are taking them off the streets, as this woman was, and keeping 4 dogs of a type often bred by criminals for viciousness, then yeah...you are asking for trouble.
Take something like this weighing up to 160 lbs, add poor breeding, multiple dogs and a woman of uncertain experience, and you have a recipe for trouble:
True pit bulls do not get much over 70 pounds.
Further proof that pit bull haters are liars and cowards.
What’s it like to stay in on sunny days because you are scared of your own shadow?