To be clear, I do not in any way deny the possibility. Further, chemistry appears to be the same no matter how deep observations sensitive to such can be made. And that we exist means life is possible (statement of the obvious :-) ).

However, it might be exceedingly unlikely for reasons yet to be found. And again, we've no evidence at all that it exists beyond Earth. So saying "Life is everywhere" is a leaping statement of faith, not fact. Also, saying the "probability of them not existing is way less ..." is also a statement of faith. No probability can yet be determined beyond saying it isn't zero.

Caveat: Were the universe truly infinite, with matter and energy distributed much as we see it in our "corner," then yes, everything that's possible will happen. But as I read it, the universe is not infinite in that manner.