Because, if next season Juventus fails to perform well, then I'm sure Inter and Milan will be the top two teams in the Serie A standings next season. Although indeed, there are other teams such as AS Roma, Atalanta, Napoli and several other big teams. But I personally don't believe they will be able to be consistent, because it looks like Inter still has the ability to dominate Serie A next season.
But if Juventus fixes everything and reshuffles their main squad to be more productive, I'm sure Juventus can compete in Serie A next season, I know that Inter Milan is still the strongest team in Serie A but all teams have the opportunity to be even better next season , whatever we see this season is bad, it doesn't necessarily mean that next season they will play bad again, I think there will be quite tight competition in Serie A next season, that's why the top teams in this league will definitely make major changes.
Juventus are also not only focused on the domestic league because they will also play in the UCL, if they still use the existing main squad of course there will be no changes to their game like before, to be honest this season Juventus is not very productive so they need lots of new players. be productive enough next season, if you want to compete in the domestic league or in European competitions such as the UCL, Juventus must do this to change things for the better. I'm also not sure Intermilan will play consistently like this season.