Imagine I posted "UGA has not been scored on this year."
If someone corrects me and says, rightly, well, you mean TDs, as they have allowed FGs. My best course of action would be to own up and say "Yes, I misstated, I meant TDs. instead of my absolute assertion."
Or, option 2, I could resort to profanity and name calling and look much worse than had I made a simple misstatement.
Likewise, "every single metric" is unambiguous, as opposed to, say "nearly every important metric", or "most metrics".