Strange that many people talk about Lukaku being needed by Juventus, but don't talk about Lukaku not being needed by Chelsea or Inter. The impression is that Lukaku is not attracting interest from big clubs at the moment and it will probably be difficult for him to continue his career. If he was a sought after player, Chelsea probably wouldn't have agreed to a deal.
And it also doesn't make sense for a team to reject the best players, basically they need the best players for next season. Actually, Chelsea is in need of a young player whose talent is not much different from Lukaku, while Inter Milan and Juventus are still hoping to get Lukaku because they have also seen how Lukaku played last season in the Inter Milan team. So actually Chelsea also didn't reject Lukaku, it's just that they might need a younger player than Lukaku.
For Chelsea, yes, it's true they need a young and quality forward from Lukaku. After all, the Premier League is the league with the highest competition, and to be competitive in this league, you need to be a little stronger and durable. When they find a young and good football player, they want to transfer with more money. Considering the options, I think Chelsea need a striker like Osimhen.
Basically, the age of 30 is still a productive age, so it still makes sense that Chelsea will still play Lukaku. Also, the fact that Juventus are interested in signing Lukaku and that means, Lukaku is still in demand by big clubs and Juventus is one of them. Because anyway, it looks like Lukaku's career has more to do with Chelsea and also maybe Inter. So, if there are other clubs like Juventus who have interest in Lukaku, then I am sure it will be a refresher and a different color for Lukaku's career as well. So yes, I personally might hope Lukaku plays for Juventus compared to Chelsea and Inter, because it seems like Lukaku often gets into trouble with both teams too.