Yeah, fair enough. But within the confines of the sport if have thought it was worth getting his scrawl on the contract. Especially if it was my job to sort that kind of thing out.
It is, and just because another football team is in the same geographic area for a few fleeting moments doesn't mean anything. The deal has already been concluded, Raoila has done a lot of the ground work at this point.
All parties are in complete agreement, you won't then decline the offer when you are set on the move, you have notified Juventus of your leaving. Made the president have to save face, the public and fans are now resigned to you leaving Juventus.
Allegri already planning you not being in the squad, speaking to players like Pjanic saying this is your role now, Pogba can't just turn around and go "Right I'm staying a year now", he will have egg on his face, the fans won't be so welcoming it's highly unprofessional.
Looking at it from a business perspective, Pogba is getting paid more money at United, Juventus are getting a higher fee. (nearly 2 times the amount in wages and transfer fee), Real Madrid just wouldn't make business sense for both parties.
Factor in the fact that Pogba knows Manchester, he has family still living in Manchester, one of his best friends at Juventus is Evra who loves the club. Pogba saying he still loves Manchester, its deep seeded.
A few minutes in New York even if he met Zidane wouldn't change that. I don't suddenly want to change my career based on speaking to a guy for 5 minutes, it takes months on convincing and Pogba by the looks of reports has been convinced for a long time of joining United.