That's not exactly true. China has a firewall which restricts access to the internet at large so you can't use Tiktok or Instagram for that matter in China. Tiktok and Douyin (Tiktok in China) are essentially the same app. Douyin has more features and of course since it's in China, more content control.

>What next, we'll legislate away selling drugs to kids?

And that worked out great; drug use among kids nowadays is way higher than it was in past, the drug industry is larger than ever, and cartel violence is killing countless more kids in the third world than drugs ever killed.