You arent talking, you are consuming. You can consume all you want using web interface. App tracks users, builds detailed profiles and can be used to spy and manipulate whole population (elections). Sure bookface does the same, but bookface is under US jurisdiction and there can be at least a glimpse of oversight. The only oversight tiktok receives comes from Chinese Communist party officials lawfully installed there "to provide necessary conditions for the activities of party association.".

https://asia.nikkei.com/Business/Companies/China-s-companies...

https://www.cnbc.com/2023/07/12/communist-cells-influence-co...

https://www.wsj.com/articles/xi-jinpings-subtle-strategy-to-...