Just because he isn't the main problem, doesn't mean that he's still not a problem. And even though I have little love for defensive statistics (including the ones you cited), he's still got the worst defensive box score plus/minus of any of their rotation players. There's a lot of turd polishing here for a guy who is never going to be an even league average defender. He's too small, too weak, and too slow. He would be a fun sixth man instant offense guy off the bench, but you are in for a world of hurt if you're relying on him to do anything but have the world's most punchable face while dominating the ball and getting mercilessly hunted in the playoffs.
Outside of one great series against a flawed Knicks team and being in the building while Ben Simmons and the Sixers imploded, this guy has done nothing but lose. He's the ultimate empty calories guy that this front office should avoid like the plague. Not to mention the off the court stuff... bad teammate, bad dude, just about the anti-Spur in every way.