Underage individuals don't have access to sources of money to fund gambling practice. If they are going to gamble, it's going to be with pocket money, mostly given by their parents. Then, it's responsability of the parents to investigate where their children are spending the money.

We don't need KYC to protect people from gambling prejudices, and it's in fact good to hear non-KYC casinos are growing in popularity these days. The government wants to track all the steps of the citizens, as if they were government's slaves. The less the government knows about you, the better. Authorities should be concerned about criminals and mafias which have great influence in different regions, instead of making deals with them on the backgrounds and persecuting average citizens through taxation.