Napoli never ever wanted to sell their key player to their rival. That's why selling him to the Juve is just a dream. They even restricted him on their agreement with Galatasaray to never sell him to the serie a club. That's why his move to the Juve was impossible.
I have no problem with Napoli not selling Victor Osimhen to their rival because they know what Victor Osimhen is capable of doing, and if they sell him to Juventus, Juventus might become a Scudetto contender overnight. Napoli restricting Galatasaray from selling Victor Osimhen to any Serie A club shows that they are mean, and it is not a good sign of sportsmanship.
Napoli is indeed very cunning, they don't want to see their rivals have star players that Napoli previously had, even though Napoli should remain professional in competing in Serie A and continue to do their best even though their rivals have Oshimen because it is not certain that Oshimen can make the club win the title, even though Napoli without Oshimen is already able to win the title because they have good players and they have also added Kevin De Bruyne, they should not be afraid of being left behind, in fact, their attitude will actually backfire on them, making it difficult for them to defend the title.