[Dalewyn]

If foreign interference in domestic politics is a concern, you absolutely do not want foreign-owned communication channels operating within you. They have every reason to manipulate discourse within them towards specific foreign ends in defiance to domestic interests.

TikTok manipulates discourse everywhere towards Chinese ends, X/Facebook/et al. manipulate discourse everywhere towards American ends.

This is an entirely separate concern from firewalls, which with the way you posited it might as well be a strawman.