Why would Pogba have wanted to go to PSG, when ManU - and possibly Madrid - were options? That makes no sense, and there's no way Juventus could force him to go to PSG while also forcing PSG to sell Verratti (PSG clearly haven't been willing to sell Marco).
Other than the fact that they're no longer with the club, the situations with those 3 players weren't the same. One returned to his old stompin' grounds for a record fee (Raiola and Beppe had something of an understanding from the time Pogba was signed on a free). One crashed his Ferrari drunk and was coming off knee surgery (I wish we'd kept Vidal, but I think it was all a little much from the perspective of management). One didn't get along with the coach and made a ridiculously terrible decision to force a move to Milan. For this, Bonucci got a ton of money, and all he had to give up was the possibility of winning another trophy in his professional career.
I think B81 is on point here. Extremely doubtful that Dybala is leaving this summer. Only way it happens is if he forces the move, and Juventus gets a truly ridiculous amount of money for him (like Coutinho+).