Yeah, no.
Allegri is simply protecting young players because he knows the amount of pressure they will be under after a single game, let alone more. Kaio was pronounced next coming of Ronaldo after 3 touches ffs
For years we heard insults and how he needs to play Rugani, Bentancur, Lemina, Kean etc. more minutes, then those same players were/are insulted because they're not on the level fans want them to be right away.
This idea that other teams always have tons of youngsters in their team and only Juve/Allegri don't care is very very farfetched.
Perfectly summed up by someone on VS forum: