Doesn't the multiverse hypothesis say that there could be another you or me out there but living a different life in a different world.
That's the 'many worlds' interpretation of quantum mechanics - each particle's 'choice' creates two distinct universes, and never the twain shall meet.
Or doesn't it say there could be many universes where there could be some with strange creatures or some that never created any life.
That's the 'anthropic principle' (hard or soft, I forget which) - the idea that a sufficiently large number of planets means extra-terrestrial life is all but guaranteed. If there are multiple universes, there are that many more planets!
In fact there is suppose to be a different scenario for each universe as each one was slightly different so that it could explain how ours was so right that it created us and has the perfect conditions for life.
It's often said that Shakespeare exists encoded somewhere within the digits of pi, because it has an infinite non-repeating decimal expansion. But that property alone isn't enough to ensure Shakespeare exists, as it's quite easy to select a number with an infinite non-repeating decimal expansion which absolutely doesn't have Shakespeare encoded somewhere therein*.
So I've never been convinced that 'infinite universes explains life without god' is actually sound, as one can envision infinite
empty universes with no life whatsoever.
*My own personal construction is this: consider the number 0.12345678910111213141516171819202122232425... obviously a concatenation of the integers 1, 2, 3, 4, 5... and so one. Now suppose I took that number and replaced the digit '2' with the digit '0'. I'd get: 0.10345678910111013141516171819001000304050607080931303334353637383940... and so on. This is a perfectly ordinary number
except that there exists no digit '2'. This number has an infinite non-recurring decimal expansion that
doesn't contain every combination fo digits - '1234' never exists in that number.