moderation is obviously a black art to me
.. as, indeed, it is for us as well.
I don't set out to censor posts unless they be offensive, against site policy direction, or totally silly.
I had presumed that the post cited had significance to some of the readership even if I, like you, had no idea what that significance might have been.
In short, we can't please all of the people all of the time .. and, at times, we probably get many/most off side. That's the nature of the moderation beast, I'm afraid.