Writing a white paper depends on the level of your understanding om the project you are actually writing about
That's true but that's not only about to understand the project and OP must understand about the stucture of the WP, so many amateur writers of WP didn't even know about what structure that must be used to create a new whitepaper. is not only about understand the project to build a really good WP.
i have tried translating some whitepapers in the past since i applied for some projects for bounties, its actually hard to do even just translating it. and its no surprise that most of them are committing plagiarism which eventually exposed those ICO scammers.
i couldn't imagine myself writing one because its got to be the most boring job for a writer. i would rather create an erotic novel than a whitepaper.