There is a lack of evidence of other universes in our reality for one, and two I find it funny you assume I’m religious and the most strawman version of a religious person at that, when the reality is we still have so little understand of our universe, we have made great strides, but to claim evidence of a multiverse is as “real” as evidence of a God because that would require evidence and a complete change in how we perceive time, space and of reality itself.