But that's an "if". I thrashed a mate in about a dozen games in a row, including one where I called 'Checkmate in 8' which drove him mad. And then the following game he 'pantsed' me, drove through to a checkmate without me even taking a single of his pieces.
Is there a point here? I guess you'll rarely win a match in the Opening, but you can lose it. And maybe more people should practice end game positions instead of just playing lots of games from the start and researching Openings because of the literature volume dedicated to those.