And so why is the former consistently portrayed as useless, while the other (targeted in precisely the same way, in fact probably less accurately) is portrayed as literal mind control?
Both forms are literal mind control, but one is more devastating than the other due to the consequences that follow.
The point is, data collection at such scale is unprecedented. And what we do know from history for sure is such dragnets tend to get abused by the ones who have access to it (propaganda is one such form of abuse and hence the outcry). Unforunately, there are no philosopher kings around anymore to trust with global scale surveillance.
This can only end one way: Disaster. It is a matter of when and not if.