“There is no reason it would have to look even close to human.” Actually, if you believe the Bible, there is a huge reason why intelligent life took human form ... read John Chapter One. God started the whole sheebang with Jesus in mind, so it all moved to bring Him to fruition, and not in the form of a manatee or elephant or whale or octapus but the form of a man. Yes, it is a circular reasoning, for such is what we mortals have as our means from our temporal perspective.
Excellent points.