> The US government only accesses it if they have a reason to do so and subpoena the specific information needed

As Snowden revelations have shown, this is not the case.

> It wouldn't be hard for them to subtly start slipping in propaganda into the tiktok feeds of countries they intend to invade

Last time I checked, the USA were the number one warmonger in the world, sometimes by lying about WMD and going against the vote of the UN.

I'm not defending China, I do think Tiktok is a dictatorship honeypot, but the USA is only good to the USA. A cancer is worst than diabetes, but I still don't think diabetes is a good thing.

And google is only good to google.

I'm in the good graces of neither, being in Europe, and consider both as services that will try to get as much of me as possible when I use them. And the minute our interest are not aligned with theirs, they will bite us.