I beg to differ and say that requesting better documentation is fair, and it goes without saying that maintainers don't need to fulfill these requests, as I don't think that these requests are driven by an inexplicable sense of entitlement or unfairness to OSS maintainers, but instead a desire for more knowledge about the projects and since no one knows the codebase better than the creators themselves, it becomes obvious that you turn to them for answers to your questions or technical problems that you might face.