I don't think this will be the right decision because Chelsea is also in a downturn so if he doesn't get strong support from his teammates then Osimhen's performance will not develop and it will also not be good for his career.
I heard several teams want Osimhen, including PSG, so I think rumors of Osimhen's transfer will continue to grow in this transfer market and it is very likely that Osimhen will leave, especially if Napoli manages to get Lukaku.
However, maybe there will be hope that Osimhen can bring when he is at Chelsea, because now they also have a new coach who is expected to make Chelsea even better.
Oh yes, if we look at Lukaku when he played at Chelsea, he didn't play according to what was expected, apart from the injuries he faced, it seems like the style of play in the English Premier League, especially Chelsea, didn't suit him. Or he came at a time when Chelsea was not doing well, so that affected his performance.
Conte wants Lukaku to be in the squad, Napoli have to dig deep into their pockets, because Chelsea themselves will not let Lukaku go at a cheap price, especially since they also got Lukaku at a very high price at that time. Whether Napoli will try to fulfill the coach's wishes or not, what is clear is that they must first try to negotiate so that they can fulfill their coach's wishes.
The latest news is that Osimhen will reportedly be released to PSG, the two club officials have held a meeting. Previously, it was widely reported that Arsenal and Chelsea were very interested in recruiting him, but the two clubs gave up their intention because they were hampered by Osimhen very high price. In terms of quality, Osimhen is said to be better than Jesus, Nketiah, Jackson and Nkunku, but president De Laurentiis will not let go of his assets at a cheap price.
Conte desire to recruit Lukaku is of course based on Osimhen departure. If Osimhen stays, Conte will not need to look for a new striker in the summer transfer window. Sure enough, Conte also faced obstacles in completing Lukaku move from Chelsea, where the Blues also set a high price for Lukaku. But Napoli will get a big profit from the sale of Osimhen, which they can use to recruit Lukaku.