In fairness, I'm not sure anyone is really an expert on this (although this doesn't detract from your point at all.)

You are right, and I would certainly not expect anyone to have such expertise for me to take their thoughts seriously. I am simply wary of Economists (Robin) or AGI creator hopefuls claiming that their expertise should be deferred to (only relevant here as a hypothetical pseudo-claim). Professions will naturally try to claim more territory than would be objectively appropriate. This isn't because the professionals are actively deceptive but rather because it is the natural outcome of tribal instincts. Lets face it - intellectual disciplines and fields of expertise are mostly about pissing on trees with but with better hygiene.