Mental and physical health are a lot more intertwined than you are suggesting.

I understand this is a very complicated issue and am not entirely sure what the correct outcome is for the health of children. That being said, when it comes to the legal side of the issue, I disagree with anyone that doesn't support this bill but then supports age restrictions on alcohol/tobacco. Although arguing for a net positive regarding children's health is a powerful argument, I think it's a bit more nuanced on the legality and morality.