There is no reason to think that Juventus and Napoli are only playing for the title. It is true that Juventus have performed very well in the last few matches. They have been able to solve all the problems within the party. But there is no way to underestimate the AC Milan team. Milan is now second in the table. So I would say if Napoli loses the truck and drop points in several matches, then Milan and Juventus will try to win the title. Milan's performance this season is quite good. There is no way to neglect this team.
In this case what you say is true, but with Milan's current condition they are actually quite cornered in my opinion especially with their financial condition which makes this a little difficult.
Milan's current condition in the standings is still very good but on the other hand we know that they currently have a lot of gaps that make them a little insecure and even after the break is over I'm actually still quite pessimistic about how they will face this season.
You're right that Milan is a bit of a mess right now. At the same time they are in a somewhat weaker position financially now. However, I did not see any weakness in Milan's attack. But their defense is a bit weak. And for that, they can back off. The Milan coach will definitely need to strengthen his defense after the World Cup break.
We are not sure how the teams will perform after the long World Cup break, or if the teams will be able to play with their main squads. The performances of Juventus and Napoli are also likely to deteriorate. But if you want to win the title, you have to keep the performance stable after the World Cup. And it will be unfortunate for the team if any key player is not with the squad due to injury.