Jerry didn't run the Sixers, he just advised Harris to hire a really bad person to do so (I.e. his son). And of course the NBA forced all of that to happen, and Harris let it.
I doubt Harris sees the arena deal as his chance to sell high. More like, that's the business he and his partners have actually wanted to be in all along. But that's also 15 years away if it happens.
Best scenario is he's too busy running the football team he loves most in the region he is actually from and the Sixers can operate more normally. I think that has probably already happened to some extent tbh, with Tad Brown coming over from Houston as CEO. This is his and Morey's show now, and there's only a few performances left.