The argument follows from the first thing I wrote in this thread. Our understanding of complex systems is through abstractions, but abstractions (by definition) hide the details. Just as attackers can exploit details that are 'below the radar' of an abstract view, AI with a mind of its own (which it would have, by definition) could probably do things that escape our attention, including social engineering. That is not necessarily bad, but it might be out of our control.

To be clear: I am considering real AI, not that which is sometimes passed off as AI these days.