Yes, these are not causally connected, so we can call the different universes. I interpreted the original post to be saying that if life is very improbable the

Yes, these are not causally connected, so we can call the different universes. I interpreted the original post to be saying that if life is very improbable then it is unlikely we would be here. And If there were only one universe then yes, it would be unlikely we are here. But if there are many universes, this could support a vanishingly small probability of life with most universes being empty, but a small fraction having life. So these different universes are meaningful only to the extent you are asking philosophical questions like this, but not to most practical considerations.