> Yet people are arguing that we should allow the people who did that to continue to install apps on millions of Americans phones

This paternalistic framing is the disconnect between you and those opposed to the ban. The idea that it's TikTok insidiously worming its way onto American phones like a virus. In reality, people download the app and use it because they like it. This ban will, in effect, prevent people from accessing an information service they prefer. You must acknowledge this and argue why that is a worthy loss of autonomy if you want to meaningfully defend the ban to someone who doesn't like it.

If it helps, reframe the ban as one on a website rather than an app. They're interchangeable in this context, but I've observed "app" to be somewhat thought-terminating to some people.

For the record - I would totally support a ban on social media services that collect over some minimal threshold of user data for any purposes. This would alleviate fears of spying and targeted manipulation by foreign powers through their own platforms (TikTok) and campaigns staged on domestic social media. But just banning a platform because it's Chinese-owned? That's emblematic of a team-sports motivation. "Americans can only be exposed to our propaganda, not theirs!" How about robust protections against all propaganda? That's a requirement for a functional democracy.