If we do wish to take the theory seriously, as we should since it is so powerfully accurate, then we are led to the Many-Worlds Interpretation as the most "face-value" interpretation.
If we accept quantum mechanics as an accurate description of the world at the microscopic level, then we must translate its mathematical framework into an interpretation.
Many laymen will already have heard of this theory in popular science and sci-fi shows, but may be unsure of how plausible it really is. Is the MWI a serious academic proposal? Or is it just a fanciful interpretation that lends itself well to convoluted plot lines in TV shows?
There is nothing in our current understanding of physics that demands the existence of some "immaterial" entity to explain the origin and nature of reality.