I'm putting this article under Protagonism even though it only exists because I raise this point in my critique of Star Wars, since it's a moral analysis rather than a storytelling critique. Anyway, here's why the Jedi are far from the perfect heroes they're portrayed to be, and arguably even more bad than good:
The Jedi support a state.
The Jedi forbid "revenge", by which of course they mean any action that punishes someone outside of immediate danger; they usually disapprove of killing a dangerous murderer or tyrant as long as he isn't in the act of attacking. This is ironic since they support a government, and all governments take revenge.
My main criticism of the Jedi order's spirituality would be the way it seems to revolve around the suppression of emotion. Emotions are not a force for evil; while it's true they can be a source of temptation, they can also be a source of exhortation. Anger, shame, sympathy, and any other emotion can inspire a person to stick their neck out to fight evil, seek self-improvement, or make sacrifices for the less fortunate. Even if you don't believe in axiological retribution, anger can at least help ward off fear.
The Jedi have a chain of command; there's no basis for the legitimacy of such a thing in a religious order based on a static creed.
The Jedi forbid romance. This stems from their suspicion of emotion, and so, my same argument applies. There's no reason a Protagonist mage warrior would be forbidden from partaking in reproduction.