[freetime2]

This is an incredible misunderstanding of the Anthropic principle. It has nothing to do with god, it does not suggest that life could only exist on Earth, and it does not suggest that we are alone in the universe.

If anything it's an argument against Intelligent Design. E.g. life is the statistical result of a vast universe (or multiverse) of permutations - some of which are not conducive to life, and some of which are. And when life looks out and says "wow it's uncanny how perfect this place is, there must be a divine hand at work" - it's only observational bias that makes it appear that way. Because life could only exist to make such observations in regions of the universe which are suitable for life.

But on the other hand it also prevents one from saying "we exist, therefore intelligent life must be commonplace".

[XorNot]

i.e. the puddle thinking how fortunate it is that the ditch it is in is the perfect size for it.

[ithkuil]

That's the weak anthropic principle.

The strong anthropic principle is: the puddle thinking how fortunate it is that there water at all