Sure it could. But GRs don't have the jaw strength PBs have. That's not to say they don't have strong jaws.
Just as there are differences in individual dogs of the same breed.
That's true. There 100% are outliers in every breed. But there are breed specific tendencies and characteristics that their owners need to be aware of. For example a GSD or Malinois could be incredibly dangerous without addressing the special needs for those breeds.