It would seem that this group would attract petty, small-minded
humans, insecure about their place in the universe; the type who
would go into teaching just so that they could be in a postion of
authority over others :-).
Another thing, regarding the amount of "human" aliens in UF, has anyone
in the multiverse put forth something like the Solmani Hypothesis from
Traveller (the idea that humans orginally all came from Earth but some were
removed by an advanced alien race for some unkown reason and "seeded" across
the galaxy.)