He doesn't look that bad. He could have been getting mad especially in certain spots. I think she'd rather risk not cutting the cat and getting bit then making sure it's nice and even. Also on cats you can't really get the fur even because their fur is so soft.

I don't recomend going to Pet Smart's grooming though especially for cats. They use restrainers on cats which freak the cats out even more a usually a cat muzzle (which covers their whole face). Of course yours could be different.
Someone who comes into my shop said she was watching grooming at Pet Smart being done on a cat and it was strung up on the restrainer and only it's 2 back paws were on the ground.