Can anyone explain the "threat to national safety" angle to me in explicit terms?  That is, just saying "national safety" isn't enough.  What, specifically, is the threat?  I'm an IT nerd, so please, be technical.
		
		
	 
Isn't it user and location data?
		
 
		
	 
I don't know.  That's why I'm asking.  That said, I don't consider "user and location data" to be a sufficient answer by itself.
What user data?  E-mail addresses?  Don't care.
Location data?  Just block the app from receiving that data.  Even so, isn't it my right to decide whether I want to grant app X permission to see my location data or not?  I do so for Waze, I don't do so for TikTok.  But if I did want to grant TikTok my personal location data, who is the government to tell my I can't?  Seems like a wild violation of my rights.
		
 
		
	 
Keystrokes, web search history, app purchase history, your name, age, username, phone number, location, IP address, mobile carrier information, device information.
If you are uploading videos it tracks the types of images, location of the image, content of the images to identify places of interest, all of the metadata of the videos.
Essentially if you use tiktok quite a bit, they would know:
Your name, address, phone number, credit card info, shopping habits, web habits, personal interests, the type of phone you use, where you travel. From this they could likely figure out where you work, what you like to do in your spare time, where you go in mornings, evenings etc. Sleep habits etc etc etc.
They theoretically could have detailed profiles of every single American user of the app and use this information to attempt to gain a foothold for someone to spy.
Say they see a user who is often traveling to a known government building, they are often searching for deals and sales for items, maybe they even search for things about how to earn extra money. They decide this person is succeptible to be bribed for information. It would be effortless to pose as a person of likeminded interests and get close to/extract information from.