I think his grain of truth is that human private knowledge is a) not special and AIs can/will do it too, and b) AIs will vastly outstrip human capacity for this type of knowledge.
At the minimum you ought recognize that world class experts would disagree with your dismissiveness. Trying to explain the differing positions should not earn such immediate dismissal.
You're also failing to comprehend my passing comment about professors as a minimum criterion for the diversity of what reasonable opinions on the issue ought to like. I said it order to increase an open minded discussion, whereas you then used your familiarity with academics to validate your specific views. There's a world of difference there already, and metacognitively yours is the problematic one.