The man maintainers, at least from my own dealings with them, often don't like contributors. "Examples are nice, and I like your changes, but what if Paul Vixie doesn't?" It's easier to fork man completely and take it away from them, Xorg style.

"I've done this, to fix the problem." "Ah yeah, no need; that problem's been discussed in the past". "Ok, what happened" "IT...WAS...DISCUSSED!"