I disagree because it isn't possible for language to be precise on it's own syntactic merit. There is meaning and there is context and the biggest problem with research papers is that the context of many statements in the paper are incredibly ambiguous. The reason for that is that the papers are trying to be "concise". Context can only be disambiguated with more statements. You must eliminate potential interpretations that a reader could make.

"Spectrum sharing in an “apple-like” or a fixed set sense is not a coexistence. ". What does that mean? Coexist? Who knows, the author thought they were being precise, but they understood the statement they made with a head full of context that gave it precise meaning. As readers, we can only scratch our own heads as to what that context could possibly be.