The manpages of system daemons are definitely not being carefully curated in the way you are implying. They're written, often poorly and imprecisely, by engineers.
I'm not sure what you're implying. But I worked at Apple and wrote manpages for various stuff I worked on. Not once did I work with someone to "carefully phrase" them as "public communications". The idea of doing that would be silly. The people at Apple that do that careful phrasing stuff (marketing, etc.) don't even know what a manpage is.
