What a ridiculous statement. How can you play your opponent's or your hand if you don't know the percentages? The very fact that you don't auto fold AA preflop indicates that you are using the fact that AA is 80%+ vs a random hand as a guideline. Do you fold 2 overcards and a flush draw if you know somebody has TP? If you aren't using %s you might as well fold since all you have is probably A high...nevermind the fact that you are a favourite vs any TP hands unless the 2nd card is shared.
You can't even play a hand of poker without %s. You wouldn't have a clue whether or not to fold/call/raise or anything at all if you had absolutely no clue the odds
of you winning. The best you could do is to play position and basically play every hand solely on your reads of other players. And in this case there would never be any point of looking at your cards. And i think you'll agree that most ppl would play worse if they were completely blind to their hole cards. The second that you look at your hole cards, you are using %s the entire time even if you don't realise it.