What makes Wang think that this sort of fixed attitude - which can be made more hard-wired than the instincts of biological organisms - cannot manifest itself in an AGI?

Presumably the argument is something like:

• You can't build an AI that is intelligent from the moment you switch it on: you have to train it.

• We know how to train intelligence into humans, its called education

• An AI that lacked human-style instincts and learning abilities at switch-on wouldn't be trainable by us, we just wouldn't know how, so it would never reach intelligence.