I don't think anyone is suggesting he's taken off the floor entirely, if they are they need to get a checkup at the doctor's
My main issue is how we use him. We seem 100% set on Castle being the main ball handler and play starter when he's on the floor, and it's been very hit or miss, mostly miss lately. It's very rare to have your perimeter defensive specialist also be relied upon to be the main play maker and ball handler, and also be relied upon to be a high usage scorer and slasher, and also try to improve his shooting all at once. Very few players in the history of the game have been able to do all of that at a high level, and Castle just isn't there, and we're throwing too much at him all at once when we have other avenues in the squad. We're dead set on getting him there to the detriment of the team.
I'd like us to pivot and have Fox/Wemby be the bread and butter of the team, and have Fox be the ball handler when he's on the floor, and mostly Harper when he's not. Let Castle nail down the defensive end of things, let him play off ball, let him get the benefit of less attention on him and focus on the right things. Let Fox and Wemby break down the defense and kick it to him for a drive in when the defense is scrambling, rather than him hero-ball it like he does now. This also likely gives him more open shots to work on his stroke.
It's frustrating hitting our head against the wall over and over again without trying different things. Even if you argue it's for development purposes, are we even developing the appropriate parts of his game?