Doesn't need him to be the mega defensive stopper. What we want is "flexibility" which Barnes will provide. He can rebound, pass/put the ball on the floor without turning it over, and also shoot the three ball at over 40%.
He's also younger and barely miss games for reasons other than COVID.
Basically everything that Bogey can do, Barnes can do better(including game winners). Everything Bogey can't do, Barnes can do also. Yes Barnes advance stats aren't pretty, but Boegy also has one of the leagues ugliest advance splits amongst all starters in this league.