It's important to understand that Russell was also limited by his own particular personality and world view. He was a good example of an ENTP or "debater" personality type as was Feynman. So in writing that he was very much bound by those limitations of his own world view and I'm sure he found a lot of the behavior of his (most likely autistic colleage) confusing and most likely it didn't adhere to these "universal desires".
This isn't totally related but I love this essay by Zapfe and I think that these 4 coping mechanisms he mentions in the article are a lot more "universal" (isolation, anchoring, distracting, and sublimation): https://philosophynow.org/issues/45/The_Last_Messiah
We're all bound by our own world view of things and certainly Russell was as well. It might have been self selecting that the type of people he spent time with in that era were also very concerned with those things but I'd be really curious if he ever had this conversation about these "universals" with Wittgenstein because I feel like Wittgenstein would really disagree, and Russell would just keep trying to label autistic traits as forms of these when that's not a good characterization at all.