I'm certainly not doing anything to cure that disease. Strict privacy advocates aren't doing something to cure that disease (I guess they might be, but how would I know, they don't talk about themselves much ;) ).
I value a cure for Parkinson's more than I value my privacy. If selling the DNA I provided as part of a research dataset (that I provided without knowing who would be doing the research, but knowing it'd be someone because that's how research works) cures Parkinson's, I'm on board.