Imagine someone writes a 500 page report about censorship around the world and it is all about legislation to do with incitement of violence and hate speech but nothing else (such as sex).
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Actually, if it was represented as a report into hate speech legislation, that might be one thing, but it was branded as some sort of report into the "state of free expression" and which countries care about it more or less.
It's important to remember that freedom of expression is multifaceted. Sure, the language of hate speech legislation might be relevant, but it is not the only form of expression which is of interest when looking into how well freedom of expression is protected.