No NBA player is that bad on defense. What the difference between players usually involve effort and technique. Of course the elite also take away strength or exploit weaknesses, but no NBA play is that bad.
Same thing goes for contested shots and lay ups. Not many players can't make a layup simply because an elite defender is within arms reach. Also each player response different to a shot being contested. Rarely do they fall apart. Shot percentage changes by a few percent.
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