It's a good point and the study does some investigation of the question in Section 7 [1]. They find the trend seems to generalize across multiple speaker identi

It's a good point and the study does some investigation of the question in Section 7 [1]. They find the trend seems to generalize across multiple speaker identities. Personal experiences appear more effective than facts at fostering respect for a wide range of different speakers. [1]: https://www.pnas.org/content/118/6/e2008389118#sec-7 https://www.pnas.org/content/118/6/e2008389118#sec-7