I think perhaps people lie to themselves about their 5th functions. They think they are awesome at it, but it's often quite the opposite. For instance, INTps think they are strong, persistent, and good-looking, INFjs think they are exceptionally intelligent, INTjs think they are emotional, compassionate, and moral, ENTps think they dress well and can beat any bodily misfortune (like illness or not eating), etc. I'm not sure about the ENTp one, but on a whole, I think this is something to consider.