what matters is the negative consequences of doing something. so the justification for banning tiktok is that it destroys childrens attention spans for life and lets them get propagandized by a hostile foreign government, NOT that its addictive.
And children get propagandized by hostile foreign governments everywhere online. And by their own government. The premise that TikTok was somehow more dangerous in this regard than Facebook or Twitter or even Discord is based entirely on sinophobia.