Many-worlds has made steady progress since it was invented. Especially early on, trying to bring in diversity would get you some many-worlds proponents rather than none, and their views would tend to spread.
Think of how much more progress could have been made if the early many-worlds proponents had gotten together and formed a private colloquium of the sane, providing only that they had access to the same amount of per capita grant funding (this latter point being not about a need for diversity but a need to pander to gatekeepers).
Many-worlds has made steady progress since it was invented. Especially early on, trying to bring in diversity would get you some many-worlds proponents rather than none, and their views would tend to spread.
Think of how much more progress could have been made if the early many-worlds proponents had gotten together and formed a private colloquium of the sane, providing only that they had access to the same amount of per capita grant funding (this latter point being not about a need for diversity but a need to pander to gatekeepers).
It isn’t clear to me that the MWI-only group would have achieved anything extra—do you think that they would have done?