Isn't it interesting though that out of all the players you listed, the guy with the shortest wingspan (Fox) is the one
leading the league in deflections per game? He's also second to SGA in steals per game.
I also think there's an aspect of this that you've overlooked -- you mention Keegan struggling against Booker this season defensively (which is true)
but I don't think that's because Booker is too small/quick for him to stay in front of. Booker is incredibly crafty at pump faking and drawing fouls even when you do stay in front of him. In fact, a lot of his points are scored on back to the basket mid-range shots where he puts the defender on his back and leverages them to create space for a fadeaway jumper -- a skill which obviously has nothing to do with speed and requires rather a disciplined defender who won't fall for the fakes and can contest a fadeaway without getting into Booker's body. Those are incredibly difficult plays for
anyone to defend, let alone a second year player who has not yet been able to receive the benefit of the doubt from the officials.
Shai just straight up jumps into people for calls though and there's no beating that in 2024 unless you're the Lakers and you have the anti-"ref mode" cheat code.