I think there's an intentional subtext in Star Wars that the Jedi don't really know what the hell they're talking about. It definitely comes through in the new trilogy. This is why the force needs balancing in the first place: it's represented by two groups of guys with clearly unhinged points of view. You have the Jedi, whose message boils down to "suppress all your emotions," which is definitely not healthy, and then you have the Sith, whose message is "KILL EVERYTHING", and that's not really healthy either.