that's a bad example, because the organization that cured polio moved on to 'other things' and is now one of the 'go to' examples of charity drift and nonprofit mismanagement.

That's interesting, and I didn't know it before (reference?), so thank you! But my point was to use an apolitical example to illustrate the flaw in logic. Whether or not the same organization was mismanaged is irrelevant to that point. In fact, that they "moved on" to other things is evidence to my point that you cannot infer a polio-cure organization actively excludes other illnesses in a general "what are important problems to solve" sense.