There's a difference between accidentally stumbling on shocking TikTok content and willingly browsing a gore site.

If my kid really wants to check it, it might be acceptable, but I'm not ok with an algorithm showing it by surprise.

I wouldn't want my kid browsing TikTok or anything with addictive recommendation system either, but I was mainly talking about explicitly taking effort to keep teenagers away from questionable content. But actually I'm not sure exactly how much policing the OP intended.

It seems to me like a way to get your kid to not tell you anything in fear of censorship.

Thats basically how it worked back then too. Instead of an algorithm showing you this stuff by surprise it was your buddy in the computer lab saying “hey check this out.”

You won't know for another 10-20 years for what you are de-sensitized to.

Also, your experience won't be anyone else's. Assuming so can create challenges.

How do you know it's 10 - 20 years?

I'm not alone though, all the childhood people I grew up with that were exposed to this questionable content seem functioning fine now.

Although I would agree that people and especially children shouldn't use TikTok or addictive things like that, but I'm mainly talking about the content specifically.