For millennia evil people and dictators have been using manipulation, propaganda, threats of violence to get entire populations to try and do "things that they wouldn't do otherwise" and humanity has not been exterminated yet. Even in the modern world there's human scammers that try everything to coerce and manipulate people. Humans are resistant to this kind of thing because it's been part of human social society since humanity began.
I don't see why the idea of an agent (who doesn't even have a physical presence) trying to manipulate people is some kind of world-ending threat when humans with human intellect have already being doing that to each other with limited success since humanity began.
I don't see why the idea of an agent (who doesn't even have a physical presence) trying to manipulate people is some kind of world-ending threat when humans with human intellect have already being doing that to each other with limited success since humanity began.