When you're trying to twist facts and observed reality to fit into a fantasy-based ideological position, it's hard to write clearly. The more clearly you wrote, the more clearly you would expose the nonsense you're trying to sell.
When you're telling the truth, and backing your argument with facts, it's natural to write clearly.
That's why Jackie Doyle-Price's article, like so many comments by the wise women of FWR, is an excellent example of clear thinking and clear writing.