When folks think about alien life, the conclusion is always something kind of like us.
If we were to find microbes deep in the soil of Mars or plankton like creatures under the ice of Europa, that is alien life because it’s not from here.
So when I think about the vastness of the universe, I cannot buy into the idea that every planet circling a sun’s habitable zone is a sterile world.
Who said anything about sterile planets? I believe there are planets pretty much like ours some where out there...they’re just not close enough to be visiting us. Unless one believes that Star Trek was real!!!