The scientists don’t seem to realize they are delving more and more into the mystical.
The universe was supposed to be everything, it loses its meaning if there are “infinite universes”.
All they are saying is that whatever caused our (enormous) local neighborhood (formerly aka “the universe”), there is a LOT more stuff out there in what we used to call “universes”.
Also, if you think they can detect other universes having bumped into our entire universe, based on their Earth bound readings of background radiation, well good luck.
What was in between them before they bumped?
Maybe that's because using observational evidence isn't "delving more and more into the mystical."
I prefer to use the phrase, "infinite realities".