If you want people to solve that math problem then state a problem equivalent to that one!

Otherwise the context of “how/why you're being given that fact” is relevant, because the problem being discussed asks for P(X+Y=2| being told that “X=1 or Y=1”) and that depends on P(being told that “X=1 or Y=1”|X=1,Y=0), P(being told that “X=1 or Y=1”|X=0,Y=1) and P(being told that “X=1 or Y=1”|X=1,Y=1).

You cannot fault people for noticing the relevance of the missing information and pointing out that the problem you posed is not the one that you think and the answer may not be the one that you propose.