Replace TikTok with food, porn, or drugs. At some point the individual has to take responsibility for their actions and seek support if it's something they can't do on their own. Or we just ban everything.
Yes we shouldn't ban everything, but there's a large spectrum of acceptable regulations with different tradeoffs and it's fine to discuss what your society wants in that regard instead of precluding any kind of regulation.
OP is clearly an adult capable of making their own decisions, so this regulation wouldn't help them.
So what is your point?