Juventus is indeed a tough competitor for Inter Milan this season to win the Serie A title, Napoli themselves are much different from last season after changing coaches and will certainly not be able to defend the Serie A title this season. In fact, I think Napoli will have difficulty reaching the top five positions, because from 10th to 4th place, the points are very close to each other so the competition will be even tighter.
Juventus still has a chance to win the Serie A title. They are only 1 point apart and Inter still has 1 match remaining. But that remaining game is against Juventus and I think it will really be a deciding game. If Inter Milan wins then it will be finished. And if Juventus wins then their chance is still there because Juventus is only 1 point behind with Inter winning their 23rd match. This is really interesting and I like this kind of rivalry.
even though Inter Milan can win by adding 3 points from Juventus, for me that doesn't mean the end of everything because there are still a lot of matches remaining and one defeat doesn't mean it can stop Juventus progress.
you also have to remember that soon Inter will focus on the Champions League matches, of course the players will prioritize matches in the Champions League so that this will have a big impact on their performance in Serie A.
I don't agree with what you said if Juventus loses the competition will end while the point difference is only 4 points if Inter wins.
4 is very easy to catch for Juventus while currently Juventus performance is still very convincing and if Juventus wins I won't say that this season Juventus will be the title holders because we have to remember that Milan could also be a threat.
I might just say about the fact here that Inter and Juventus both still have a chance unless there are only 3 games left, maybe we can guarantee that a certain club will be the title holders this season while Milan in third place could be a surprise towards the end of the season will increase and approach Juventus and Inter's points.