I agree 90% of his insights are worthless, and yet the real insights that remain make reading his books very worthwhile. If I could produce 1 page of genius for every 9 pages of trash I would be ecstatic! Most authors never produce any real lasting insights at all.

The value of contrarians is not in the things they're wrong about, it's in the things they're right about. I'm pretty sure that was also the point of pg's mini essay.