...fails entirely to interest.
Not in the trivial "Intelligent life may be a hell of a lot less likely than we think" sense, although that's a perfectly valid proposition as well.
But in the sense that "Some of the conditions of the universe we think to be universal and independent of our existence may exist solely for us."
For example, time. Is time as we understand it a universal concept? Our existence in time can be conceptualized as a pattern propagating through four dimensional space; assuming this is a valid model, should we expect similar patterns to be propagating in a direction orthogonal to our own, never even minding parallel?
How do brains work? I'm not the only person considering the brain as a quantum computer. Although the people trying to show Einstein-Bose condensate in the brain clearly don't understand the implications of this - the Einstein-Bose condensate would merely be the point where matter no longer has enough energy to wiggle in fivespace, and crystallizes; it looks like a smear because we're perceiving matter which in a threespace brain model is overlapping (even though in the fivespace our brains and eyes occupy it doesn't). More specifically, if the brain is a quantum computer, it must occupy a certain amount of fivespace. (Which suggests we have anatomy in fivespace we're not even aware of.) Why should we expect aliens which happen to exist orthogonal to us, and more parallel to us, to also occupy the same fivespace as us?
We tend to assume the universe is, and we happen to exist within it. The universe cannot be separated from the observer.