Where was this made clear? The closest I can see is at the very end where you call it a living document and will accept pull requests that match the "style and intentions of this document" which to me sounds like you are only interested in meeting pull requests that strength your argument to further your intended narrative.
I appreciate your adding a disclaimer about your lack of relevant experience, but even it says nothing about this being a "first draft" that you expect to have holes poked in.
So I fully stand behind my characterization and I find your use of the term "sanctimonious gatekeeping" to far less of a "fair characterization".