Painting all experts with such a broad brush leads to what is an epistemic waste land in which you are cut off from everyone else's knowledge, since you can dismiss any belief you dislike by simply declaring it expert knowledge.
I don't think he's painting a picture that all experts are automatically wrong about everything just because they're experts. Rather, that "experts" are as morally biased as any other person (it turns out that 8 years of university doesn't fundamentally change anything about the human condition), and that they shouldn't be granted unchecked epistemological authority over subjective matters. Someone who knows the truth and has a political agenda is not less likely to lie than someone who doesn't know the truth and has a political agenda, and that's even the case if you assume that all experts do magically know everything about their field.
