Good question. This video might address that:
I must say that the majority of instances that I come across a discussion of Multiverse is online, in a forum where non-physicists are more apt to be impressed by it and to even consider it seriously. Maybe I don't hang around too many physicists who are working in this area, but the overwhelming majority of physicists that I encounter couldn't be bothered by this topic.
Now, it is not that they, and I, are dismissing it. Like Don Lincoln in the video, I think I'll pay more attention to it, and put time and effort to try and appreciate it ONLY when there are strong indications that such an idea might be right. This means that there are signs of observational/experimental agreement that distinguish it from other theories. Until that happens, Multiverse is nothing more than one of the numerous ideas out there that cannot be tested and have no experimental verification.
That isn't harsh, is it?