[kiddico]

Because people literally want to give gifts to each other sometimes. A friend I met playing CS get each other a skin every year for Christmas.

[Hikikomori]

Gambling for kids so we can gift skins?

[therein]

You're almost purposefully missing the point.

A better analogy would be to say kids are banned from bringing cash to school because that makes bullies take their money and kids gamble and bet.