With ref to the CUDOS Mertonian norms...I used to think disinterestedness mean’t striving to be objective but I now think the intended meaning was for it to be taken literally.
See Mertonian norms :
disinterestedness : scientific institutions act for the benefit of a common scientific enterprise, rather than for the personal gain of individuals within them.
Robert K. Merton was a sociologist and not an epistemologist.
Thus, her norms are addressed to scientific institutions: a sort of ethics of the scientific enterprise.