Extra Terrestrials can be a useful source of meditational material. In the main they appear to be highly telepathic, thus avoiding a lot of language problems. In a telepathic society there can be very little crime, but also very little free will. Such a society can be highly oppressive, and does not favour meditation by the individual to reach higher levels. Man is not a particularly psychic or telepathic animal, and is thus free to sink to the depths of depravity or rise to the heights of enlightenment according to personal choice.
Man probably has a greater range than most ETs.
Thus ETs do complain about the depraved telepathic noise we unconsciously produce. They may also complain if the level of enlightenment is too high for them or on the wrong wavelength. When various ET races work together it may be on the basis of the dominant race telepathically dominating the lesser race with its morality. Like ourselves, ETs have a body and a spirit. Spirit is completely interchangeable between ET and Earth bodies.