I'd have agreed with this completely were it not for the fact that he's been under two managers at Juve. It says a lot that he didn't break into the team under Motta, and then same under Tudor. It tells me that there's something wrong. Either he doesn't fit the other players. or his attitude stinks. Personally, I'd go with the latter.
It might be attitude related its part of it for sure (he seems too relaxed and walking around on the pitch). But it's probably mostly health related. I doubt he has been fully healthy more then 2-3 weeks in a row all season? Especially under Tudor.
He had some hard to define injury issue all season, we still don't know wtf it was.
So it's easy for a coach to decide it's not worth for him to give him play time when he is stop and go between injured to needing time to re adjust with minutes etc.
Theres no real room for that kind of uncertainty when you chasing CL spot that is crucial for the teams financial survival.