The steps taken by UEFA further emphasize that Juventus are having a very bad season. Apart from being sanctioned with point reductions last season, they also cannot talk much in Europe in the new season. Of course, this will affect the mentality of the players, even a class of star players like you mentioned Paul Pogba, and Angel Di Maria cannot do much for Juventus. And I also think a coach is a friend as well as a parent in a club, just like friends or parents when those around them are upset, mentally down, etc. Should be able to handle that. But yes, the character of coaches is different, so Allegri's character doesn't fit in at Juventus.
Because a trainer as old as that lacks tactics and strategy doesn't seem like a great coach. Even though Juventus players now have a lot of great players. The great ones are trained by the stupid ones, they will gradually become stupid too.

But I agree with this decision so that the club management can quickly realize and try to improve in the future so that the same mistake does not happen again. Because it's really sad to see Juventus now, the players don't know anything, so it has an impact because the actions of high-ranking Juventus officials have had an impact on world-class players, instead they have become the target of the media due to financial fraud carried out by irresponsible individuals.