Imagine if your next surgeon had this sort of attitude about the cleanliness of her tools, the operating theater, and her staff's equipment. Cleaning is hard, maintaining cleanliness is hard, and pathogens evolve in amazingly clever ways. Perhaps, it will always be possible to propose a theoretical flaw in the procedure.

This is no reason to give up though! It is no excuse for not following best practices, consistently! That is malpractice, when done by a doctor! And their field is at least as complex as our own.