If we demand teachers who are superhuman caricatures of realization, who never stumble, never hurt, never cry, we misdefine realization and so block ourselves from experiencing our own innate realization in this moment. The teacher is nobody special. In fact, he's nobody at all, just boundless openness; that's why he can help you realize that you are too. And that makes him the most special person in the world. Even if it were within the teacher's power to manifest as an outwardly flawless, ideal being, she probably wouldn't do it. That would just encourage us to fixate on her as one more false absolute, instead of raising our gaze to the level of the one real Absolute. Jesus repeatedly (and unsuccessfully) attempts to deflect such fixation:
Why do you call me good? There is none good but One — that is, God.