People will misuse any tool given to them, you can't blame the tool for the actions of the one using it. Of course people will have inflated requirements for dungeons and whatnot based on the gear score but that is just the player being an idiot. I think it's a very useful tool to at a glance see if someone has completed the previous content and gotten gear from it to help them with the current, or to see if they have put any effort into being the best they can.