The planet KIC 8462852 in question is 1481 lightyears away though. What we're seeing is what happened there 1481 years ago. To even send signals there would take more time than we have until multiple pending near-extinction situations that we still either can't agree on how to fix or don't know how to.
If they have an inhabitable planet, considering how rare they, are why should they be so generous. We should be more focused on the problems at hand.
