This mashes a few different ideas together that don't really fit. Cargo-cult thinking means emulating something's appearance without understanding how it works. This is a specific kind of irrationality. Removing gall bladders en masse is also irrational, but it's not a cargo cult. The beliefs of a cargo cult may be unfalsifiable, but that doesn't mean all unfalsifiable beliefs are like a cargo cult.

It may be perfectly reasonable to be unable to imagine a belief being falsified. For instance, what would it take to convince you that you remembered your own name wrong and that you've been called something different for your entire life?