Let me start with the disclaimer that I am not a theoretical physicist, nore even anything close to that...
So what I'm saying/ know on the topic is limited to the extend of what I learned from watching talks from physicists like Krauss and Brian Greene, who try and explain physics in layman terms.
To paraphrase Krauss on your very question:
The multiverse is not something we dreamt up out of the blue... we've been driven to it. We've been driven to it, by the mathematics, the predictions of models like inflation theory, string theory, quantum mechanics... and some of us have been driven there kicking and screaming, like me. Because I don't even "like" the multiverse idea, I think it is ugly and unelegant. But, here we are, with models of reality that seem to work, and from which predictions of a multiverse naturally flow - it's inescapable. So, while these models are far from conclusive at this point, I'm willing to explore that. Not because I want to, but because I have to. Because as a scientist, I need to go where the evidence is leading me.
So I'm guessing the short answer to your question is "yes".