It's worth noting that this doesn't just apply to groups. There is such a thing as an ideologically diverse individual. See for example the Ideological Turing Test [1]. If an individual can successfully apply the filters of diverse ideologies, they at least have the potential to swap out those filters and apply them to their scientific judgments.
Perhaps we should should systematically apply and score such tests to scientists and use the results as additional data with which to evaluate their work. True, ideologically homogeneous people could learn just enough about their opponents' views to score well on such a test. But even cynically pursued, learning to do that would train them to have those diverse lenses in their toolkit, making them easier to apply and consider.
[1] https://www.econlib.org/archives/2011/06/the_ideological.htm...