Yeah - point taken. It's fairly speculative at this point - until we know more, I'm sticking with wagering that complex life requiring a fairly narrow band of conditions. Despite that, it seems that life ought to have arisen a great many times. 100 million planets with complex life seems optimistic.
Yep, I realize that this is an argument from ignorance - or would be, were I making an argument. :p
Yep, I realize that this is an argument from ignorance - or would be, were I making an argument. :p