How are you all saying... because we must be inferior that they wouldn't bother or it wouldn't be worth it for them to make contact with us??
First off, we may be different. We don't know what they are, what they would look like, how they think, etc.. so if they discover us then it's possible that they would at least want to examine us and our planet.
Second, we examine, explore the habitats, and "make contact" with less intelligent organisms, who are less advanced than us right here on Earth. So wouldn't another race of people do the same to a creature on an entirely different planet.