If it's worth reading, it's worth reading. "Speed reading", to the degree it's meaningful at all, only applies to a few cases: skimming repetitive things, like a collection of news articles on a topic; stuff full of filler (e.g. business books), and doing a quick overview of a scientific paper before going back to the top and reading it carefully and slowly.
And honestly, in the first couple of cases: why read that stuff at all?
And honestly, in the first couple of cases: why read that stuff at all?