Comparing a few (not "lots of" as you claim) specialists scattered around societies around the world is not a good representation of civilizations around the universe (or at least, we can't assume it to be).

As human as it is, most exploration has been grounded in financial and egotistical needs, not scientific exploration. Maybe the civilization is just as curious as we would be and thus would come for selfless reasons, but that's a pretty big assumption.