Randomness wouldn't have a motive. In fact, that's my suggestion. You cited several scenarios wherein intelligence and anomalies converge, and I am suggesting

Randomness wouldn't have a motive. In fact, that's my suggestion. You cited several scenarios wherein intelligence and anomalies converge, and I am suggesting that randomness is another possible (and perhaps likely) one. I suppose this possibility is not unlike your accident suggestion but, perhaps, less bounded.