But it's also possible that we simply could not conceive of the kind of transformation which the alien contact would bring about. Lots of native tribes were actually eager to contact European explorers but had no idea that it would lead to the more or less complete destruction of their culture. There might be an analogy in contact with aliens but an analogy which are simply incapable of even understanding, despite belief that we are the most advanced thing around.
It's also possible that we were not alive and/or could not have understood the "howdy" when it occurred. We are but a primitive species. To think that somehow in the last 1000 years or so somebody must have made contact in a way we could understand -- or there is nobody -- is really pretty arrogant.
How about accepting the apparent fact that we are completely alone, instead of trying to satiate our immense egos with fantasies about why someone else would possibly want to ignore something so important as the human race?
But it's also possible that we simply could not conceive of the kind of transformation which the alien contact would bring about. Lots of native tribes were actually eager to contact European explorers but had no idea that it would lead to the more or less complete destruction of their culture. There might be an analogy in contact with aliens but an analogy which are simply incapable of even understanding, despite belief that we are the most advanced thing around.