> rationalists hope that if they take one map, and keep updating it long enough, this map will asymptotically approach the territory

That is, as far as can be detected, what the human brain does. It isn't just the rationalists who have a view and keep updating it, hoping it will asymptotically approach the territory. It is exceedingly difficult to have a strategy that doesn't do that and still be a semi-functional member of society.

I'm struggling to see how someone could hold 'different' maps because they become one map in your head. Rationalists are perfectly comfortable with there being multiple possible scenarios leading to an outcome.

My guess is that this observation is going to the fact that rationalists are very, very uncomfortable (to the point of falling apart, sometimes) in accepting "because I say so" as sufficient evidence to update a view, change behaviour stop arguing and be a good sport about the whole thing. Which is very much a social faux-pas when dealing with high status people and often a mistake when dealing with inarticulate people who are nevertheless correct in their view.