You assume that banning usage was the first step instead of the last step.

I'm not OP, but I'm guessing they started with talking to the kid, or more intermediate steps.

> Are you concerned at all about your son's ability to cope independently from oversight and control?

Kids aren't fully independent for good reason, and a very hard part of parenting is deciding how much independence to give them vs. sheltering them from the parts of the world that will hurt them. If a kid comes home with drugs or hardcore porn it is completely reasonable to confiscate them with no regard for independence and control. Is TikTok the same as heroin? No. But it is provably harmful in any number of ways that young brains do not have the tools to handle, and the benefits are arguably non-existent for most. With other things like sports, we know that there is the possibility of getting hurt, but that can be mitigated and the benefits far outweigh the risks.