There is no way to detect our civilization bio signatures and technology signatures from more than a few closest stars range at most. None at all. Not even with

There is no way to detect our civilization bio signatures and technology signatures from more than a few closest stars range at most. None at all. Not even with magic. There is likely hundreds or thousands of isolated alien worlds in the galaxy, the is no point in getting to them just because they they are alive, because of the next problem - it is absolutely mind boggling what amount of energy and technological advances are mandatory to even short interstellar travel. If you can solve them all, your civilization are practically gods. Why would they concern themselves with some early stage civilization, to which they must travel for millennia in an iron box? This would also mean they have solve immortality btw, or they would all die in transit.