Recap
Chelsea will loan Romelu Lukaku again, this time probably to Napoli.
Nowadays there is talk that Osimhen could be transferred to Chelsea. Napoli could partially fill Osimhen's void with Lukaku. I think such a swap between the two clubs would make sense. Both teams would get what they need in such a deal. Anyway, I don't think Napoli can keep Osimhen any longer. Napoli are a waste of time for Osimhen. He should play for better teams for his career. And Lukaku can have his last big team experience with Napoli. If he doesn't get good stats at Napoli, he will be forced to choose between a salary cut or a move to the Arab leagues.
It only makes sense if Chelsea can win - otherwise Osimhen will only ruin his career, especially if he stays there for long. If he needs to win, it's a mistake to move to Chelsea. He needs to choose another club that can most likely at least win their league and who are decent in the Champions League. It's hard to say exactly which club would suit him and even more so which club would be able to accommodate him, but definitely not Chelsea
I think the decision to go to Chelsea is not that bad. Though, Chelsea is unlikely to win the upcoming season. But, Osimhen can gain many experiences from playing there. And again, osimhen has PL as his dream league. The problem is none of big PL clubs other than chelsea are interesting on him due to the his expensive price.
Chelsea is the only team that wants to recruit him. Other PL clubs have dropped their interest. Osimhen cannot reject Chelsea's offer. Though this is gonna be so hard for him but he must step up his career, and the best way is moving to the PL club.
You can't even suggest which club that is gonna fit him. So, joining in chelsea is still giving him a chance to success.