You are cynical but not cynical enough. The idea of a rogue Ai gives plausible deniability when they can blame human hubris, rather than it being seen as a deliberate and calculated attack, the perfect cover story for a sinister scifi plot. Make it look like an accident ehh
I can't even tell whether the poster to whom you're replying is saying that "let's uh, stop" is profoundly naive, or that failing to say it is profoundly naive... I've certainly seen both takes elsewhere.
Vitalik Buterin: “...But currently, I see zero plans for how to deal with an ASI transition that are not naive. Perhaps humanity is stuck with a choice between naive and naive squared (or maybe even naive squared and naive cubed), so I feel inclined to cut some slack to people who are trying.”