> Uhhh… how would literally any finite number of humans actually read and comprehend the log outputs of even a single agent, never mind hundreds or thousands of them interacting with each other over weeks across disparate systems

I mean there's quite a lot of people in the world whose specialty are to dig through logs from "hundreds or thousands" of clients, including intentionally deceptive ones, to spot problems.

The ridiculous thing is to mythologize these pretty standard hacking approaches. It's shocking/amazing/whatever that automated agents were doing this, but they weren't doing it through some inscrutable method beyond human understanding.