I wonder why Napoli is bent on keeping Victor Osimhen instead allowing him to play for a team like Galatasaray that is still showing interest in the player and ready to pay the amount they have offered
To be fair, it's just a business deal in the end. If you know your product is rated so highly and someone is in dire need of it, you can demand more money for it. Whether they demand too much that it pushes away the buyer is another question, though, and only the result of the negotiation table can answer that. I don't think professional players don't know that, as much as the club PR talks about being a family or something along those lines.
Victor Osimhen has proven himself to be a reliable striker that can help any team achieve success, and that is why he is rated so highly, but Napoli shouldn't be carried away by that; they should know when to sell Victor Osimhen so that they will not be the ones to lose totally, because if they fail to sell Victor Osimhen to Galatasaray this season, Napoli will surely lose Victor Osimhen next season when he becomes a free agent.