So far I have not seen any assertion that Earth is in any way less capable of initialing life than any of the others

I think that's correct Bill - but remember this theory is still kicking against the old view of the Earth as possibly the only life-bearing planet in the Universe.

Life used to be (and still is) seen by some as an incredible coincidence rather than something pervasive and naturally occurring.

What would you call such a viewpoint? Terrocentric?