Children have parents who know what their children are doing online. In any case, children don’t have access to credit cards or any other means to pay for in-game items.
1 - some children have no parents
2 - we have data to prove that parents don't know what their children do online, and never did. This is a complete fabrication
3 - children do have access to creditcards, both legally from the age of 14 or 16 depending on jurisdiction, and illegally
4 - there are many non-credit-card ways of paying for ingame items, including crypto
Anyway, given your views, I presume you are in favour of legalising cocaine and other drugs? Otherwise this whole line of argument would be hypocritical.