The link does not say what you think it says:
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The Multiverse hypothesis proposes the existence of many universes with different physical constants, some of which are hospitable to intelligent life (see multiverse: anthropic principle). Because we are intelligent beings, we are, by definition, in a hospitable universe.
"This idea has led to considerable research into the anthropic principle and has been of particular interest to particle physicists, because theories of everything do apparently generate large numbers of universes in which the physical constants vary widely."
In other words, the puddle analogy is an unsatisfactory explanation for why our universe is the way it is. The coincidences are too extreme. Part of the appeal of multiverse theory is it explains fine-tuning, which is a prima fascie problem
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Interesting hints of a Level II multiverse come from the observation that many constants of nature appear fine-tuned for life, having values in the narrow range allowing our existence (if they vary across the multiverse, we'll find ourselves in one of those places where we can exist, and there's no embarrassing fluke coincidence to explain)."
http://space.mit.edu/home/tegmark/crazy.html