You misunderstand the concern. The US government is concerned about national security interests, not personal privacy interests. You may also note [0] that Facebook (and Twitter, and YouTube) has been the subject of similar concerns by the US government.

[0]: https://freebeacon.com/national-security/congress-targets-so...

> They think china is in every corner trying to steal their data

Because they factually are. But as some people misunderstand, they're not interested in your grandma's recipes or your mom's credit card number -- they're amassing data that is a gold mine for targeted military intelligence operations.

https://www.wired.com/story/china-equifax-anthem-marriott-op...