There's something in this argument about national security, that if taken to its logical conclusion, would result in a world most people would consider upside-down:

If social media owned by foreign companies is a national security threat, then wouldn't that essentially make FB, X, YouTube a threat to like every other nation? Why not throw wikipedia in too? So now any nation can legitimately see any other source or collector of information as a national security threat and ban it at will? Taken to the logical conclusion, every nation should be enveloped by its own digital borders.

To me, it's the popular sentiment alone, for example people feeling sad and upset TikTok's gone and feeling happy that it's back, that's preventing this dismal future, otherwise governments would block apps on a whim. And this I'd say is a win.