Speculating like this is useless and generally counterproductive. It’s just a way of stating your internal biases, it’s best to recognize that bias and consider

Speculating like this is useless and generally counterproductive. It’s just a way of stating your internal biases, it’s best to recognize that bias and consider how that impacts your perception. For example, you could say, “I’d like to think these failures are a result of lack of skill or experience on the part or the doctor, careless errors, or perhaps poorly maintained tools/equipment, and not a fundamental issue with the procedure itself which could effect even skilled and diligent practitioners. I wonder if the study accounted for the experience level of the practitioner?”