It's too early for him to go to the Saudi Pro League, because he's still quite young and it would be a shame if he spent time playing in a less competitive league. While in Europe he can continue to develop his abilities very well and in the future he can become a player who will be more valuable than he is now. In my opinion he should be able to lower his ego regarding the salary he wants, because not all teams will be willing to pay him, especially when they also have to pay a high price from Napoli who still owns Osimhen. In my opinion, his move to Galatasaray was only to get playing minutes, because his chances of getting enough playing minutes with Napoli have been slightly closed after Conte said he didn't really need Osimhen in his squad.
That's why he chose Galatasaray even though he was only on loan because he still had the opportunity to play at a much bigger club when the loan ended. The salary issue is a big problem for some clubs who are interested in recruiting him because he sets a high salary and in addition Napoli is asking for a very large transfer fee. Osimhen's future will be decided this season and if he fails to perform well at Galatasaray then he will have a hard time finding a club that will accept him. Going to Galatasaray just to get game time is a much better decision than going to the Saudi Arabian League.