Firstly, this is an argument for studying "human techniques", and devising algorithmic implementations, and not an argument for abandoning these techniques.

Indeed, I should have been more specific; not all processes used in AI need to be analogous to humans, of course. All I meant was that it is very easy, when trying to provide a complete spec of a human process, to accidentally lean on other human mental processes that seem on zeroth-glance to be "obvious". It's hard to spot those mistakes without an outside view.

Secondly, if we assume that uploading is possible, this problem can be hacked around by incorporating an uploaded human into the solution.

To a degree, though I suspect that even in an uploaded mind it would be tricky to isolate and copy-out individual techniques, since they're all likely to be non-locally-cohesive and heavily interdependent.