>US wants to ban Tik Tok for the same reason that China bans Twitter, Facebook, Instagram, etc.
Except once again, PRC doesn't ban US services, they force them to comply with PRC laws that has onerous moderation overheads. And these services refused back when SV was riding high on free speech, aka low cost moderation.
IMO US wants to ban Tik Tok because they can't implement broad content/privacy rules like in PRC. Whether due to tech lobbying, because it's politically difficult, or it's politically inconvenient - US platforms implementing elevated standards will ripple expectations and costs across global markets where they operate.
Also keep in mind that even PRC hasn't tried to force of sale US companies due to national security. Require joint ventures / ramp up costs, sure. With Oracle deal out, TikTok can't even operate in US the same way iCloud can operate in PRC.