I said it "stops being just that." You removed the word "just" which changes the entire meaning of the sentence.
To carry on with your intended meaning, what is the problem if the technical documentation is more than just technical documentation? We're talking about a paragraph here, maybe 0.1% of the documentation. Are you making a claim that at some percentage of non-technical content the documentation becomes illegitimate?
I'm honestly just trying to understand what you're getting at.