I do agree that the default is "Well, he's the manager, so he's smarter" is hiding behind the door. It's usually when our opinion meshes with that of the manager. Still, it's also correct.
That said, the 30 years you mention would probably look a lot worse if most of us were in charge of it.
But as someone who's seen several sports message boards shut down, I have survived it. The process (I almost used decorum) for discussion is to disagree first, presume self-importance next, and finally ... throw some vitriol. Lord how could message boards survive that?