“the only way we can "see into" these different universes is through interference effects where the outputs of all the computers interfere with each other” <— isn’t the extent to which the parallel worlds interfere with each other also the extent to they are not really parallel worlds?
Western culture is open source. Adopt Enlightenment values, such as individual liberty, equality under law, and freedom of expression, and you are part of it. Other cultures are closed systems. KYC is based primarily on genetics and geography. If you do not fulfill the criteria, you are excluded from the same range of cultural expression granted to the in-group.
It reminds me of an old talk by Bret Victor called Inventing on Principle: https://m.youtube.com/watch?v=PUv66718DII