I think Allegri's Juve has given you a strange perception about Serie A. Just because we collect 90+ points and 10+ clean sheets every season, it doesn't mean that it's easy, you just have to look at the history of Serie A and see how many teams in the past were able to win ~85% of their games in a season, which is what it takes to finish with 100+ points.
Especially winning while playing shit, one of the specialties of Max, is something very few coaches know how to pull off. No matter what happens we're hands-down favorites to win Serie A, but if everything falls together for Napoli, Inter or even Milan or Roma, there's a chance the new coach will face a fierce scudetto race.