Why? I understand the argument for restricting access to things needed to function (housing, banking, etc). But I made a flashy twitch shooter. Why is it wrong

Why? I understand the argument for restricting access to things needed to function (housing, banking, etc). But I made a flashy twitch shooter. Why is it wrong for me to advertise by age? Ads cost money, why is it in the public good that I spend money to bother people with ads they'll never take part in?