If you're forbidding people from doing things they could do yesterday, it's best to be a little conservative with your scope.

16-yo kids might do some amount of part time work, and should at least have enough of a concept of money to understand why pressing the "more loot boxes" button is a Bad Idea. They're also old enough that they might potentially have their own bank account and their own card, which then caps the damages to their allowance.

That would require extra work to pass more legislation which has a chance to fail. I think it's better to do it all once instead of having to revisit the issue every couple years.

So what's the issue then? The minimum is 16 - or are you proposing kids 15 and younger have the right to gamble?