There are more angles on this, not exactly easy. The easiest way to make a kid to do something, is to forbid that very thing.

If you are the one cutting it off, while your kid's whole school is very much up to date with latest brainrot content, then you still lose.

Your kid is the outcast, while it will be exposed to it anyway, through peers. Meanwhile you are the bad one, making it much harder to have an actual conversation on the topic.

I am vividly interested in this, as my kid is growing up. I hear how a bit older kids play and what they talk about on the playground and feel that I have very little time left to react (kid is still just now starting to show interest in phones and such). A ban on all social media for kids would make this so much easier.