You're saying parental responsibility should govern because TikTok is legal, while cigarettes require state intervention because they're illegal. But they are only illegal because we made them illegal (for minors). And isn't that exactly what is being discussed here?
For the sake of consistency, do you think cigarettes should be legal for minors if they have parental consent? If not, what is the distinction between TikTok and cigarettes that causes you to think the government should be involved in one but not the other?
The harm from cigarette use is direct, and there is no level of cigarette use that can be considered safe and healthy. Additionally, it would be very difficult for parents to prevent their children from buying them if they could walk into any convenience store and buy them. On the other side, social media use can be harmful, but it is possible to use social media in a healthy way.
I'm curious where it ends when you start banning kids from things that are only potentially addictive or harmful. Should parents be able to let their children watch TV, play video games, or have a phone or tablet?
What's the distinction between those things and social media for you?
If RJ Reynolds was handing out free cigarettes to children, even though the parent either consented to this or simply didn't know about it, would you consider RJ Reynolds' responsible for the adverse effects of children smoking?