You're missing the actual joke, which is that "man" was the colloquialism for "dude" or "bro" in the 1970s, when `man` was created. So it only makes sense that a "man for modern times", or maybe a "man with less formality" would be called `bro`.

Personally, I've aliased `man` to `dude` on my shell, so my laptop fits in better with its peers.