It seems to me this is an example of you and Kaj talking past each other. To you, B’s perspective is “eminently reasonable” and needs no further explanation. To Kaj, B’s perspective was a bit unusual, and to fully inhabit that perspective, Kaj wanted a bit more context to understand why B was holding that principle higher than other things (enjoying the social collaboration, the satisfaction of optimally solving a problem, etc.).
It seems to me this is an example of you and Kaj talking past each other. To you, B’s perspective is “eminently reasonable” and needs no further explanation. To Kaj, B’s perspective was a bit unusual, and to fully inhabit that perspective, Kaj wanted a bit more context to understand why B was holding that principle higher than other things (enjoying the social collaboration, the satisfaction of optimally solving a problem, etc.).