Osimhen is more concerned with developing his career than helping Napoli out of its downturn.
And whether it will be good or not if Osimhen goes to Chelsea is a big mystery, but I think the possibility of everything is still there because Chelsea is a team that wants to build and in fact they are ready to spend a lot of money to bring in quality players, which means the Chelsea team has much better prospects for the future.
The truth is that Osimhen should also consider the kind of club he will choose to join because going to the wrong club could affect his performance and career because that's what has pulled so many players down so considering a club is very important especially with the kind of player he is because he a very bright player with a lot good energy and performance, so perhaps going to Chelsea will not be a bad idea but it will be more better if Chelsea will sign more player to support the performance of Osimhen.
However I don't think Chelsea will perform well if they sign only Osimhen because currently Chelsea performance is not encouraging and there is no way Osimhen alone can change that so perhaps they will need more strikers that will enhance the attacking force of Chelsea, so with that Osimhen will have the chance to perform even more than the way he is currently performing on there league.