Defense isnβt just sliding your feet. If your man beats you, you better be able to sprint and recover. He probably just needed to clarify thatβs what the drill is for.
I know lots of parents need help picking the RIGHT AAU/CLUB team. If your son didn't play varsity this year, your focus should be on DEVELOPMENT not exposure or pretending to be on a "shoe team." Status won't get your son to his desired destination, work & getting better will !