Theer's nothing wrong by giving a chance to play in the main squad but how capabale he is of doing that? Pioli was doing this caused by he has been forcing by the situation in the club. There are many players injured and pioli was taking 15 years old to play.
In my opinion if this a really bad decision. he has no enough experience to play against a team that is being placed at the 6th position. It's not about how young he was but it's about acmilan will be facing a strong club.
Putting young guy to play against a strong club is a very risky decision. I can't believe pioli puts child to play in the squad. Fiorentina can use his position as the focus to attack.
It's caused by he will be less competence in anything comparead with fiorentina's player. Very bad decision from pioli. Fiorentina will win against acmilan.
I would say that there are situations when that makes sense, yes normally you do not make a 15 year old play, but if the injury situation pushes you to the limit then you may have to do it.
I personally did that even in a game, and yes game is not the same as reality, but I can understand the thought process, for example you normally do not have 3 goalkeepers ready for a game, you have 2 that is ready, and third is probably a young one, but if not at least fourth is definitely not there, only have the youth team one, so if 2 of your goalkeepers are injured, then you play the third one, who could be young youth kid 15 year old, or even if into, then the backup at the bench will be that, and if the goalkeeper gets red card on a penalty position type of thing, the 15 year old backup from the youth team will take the place. These are all important things, and you should be aware that it may happen, not because manager wants to, but he is forced to do that.