>I'm being maximally charitable when I say that I'm not sure why RMS's personal views on what constitute "correct" pronouns merits mention on an organization's code of conduct.

To provide an example of a what an alternative third-party gender neutral option is. Even with this example, you assumed he meant "they don't want to acknowledge gender identities outside of the male/female binary."

His blog post is more about his personal preference and reasons for them, not about what is "correct."