That's not at all the case. There would need to be infinite matter in the universe (there isn't) and the laws of physics would have to allow for an Azeroth to exist (they don't) for your statement to be accurate.
Even if we're discussing this under a multiverse framework - which I believe is what is posited by the OP - this rids us of the issue of finite matter since under a multiverse framework there must be infinite matter. Cool. However, we still require some variation on the current laws of physics that would give rise to something akin to Azeroth. This is fundamentally impossible, there is no variation on the laws of physics that would give rise of Titanic beings of magic, interdimensional portals and infinitely respawning demons.
To avoid this you could posit that if there exists an infinite number of universes there must be a universe (or several) where the physical laws give rise to magic and dragons and shit. Cool, you've fundamentally misunderstood any scientific notion of the multiverse theory but other than that, you're absolutely right. WoW must be real, QED.
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And this, ladies and gentlemen, is what happens when you've read enough of wikipedia to think you know what you're talking about but lack any formal training in science. Please disregard and/or bait into long tedious conversations about who's read about the most about tiny, irrelevant quantum mechanical thought experiments.