[wokwokwok]

There is no situation where a genuine attempt to answer both X and Y is unhelpful and wrong.

Even if it's wrong, it'll still be helpful to see an attempt at answering both the question and your interpretation of a solution to the problem.

Only an incorrect and wrong attempt to answer an imagined problem (ie. Y) is actually useless.

[lmm]

Why? If an attempt is always helpful, then an attempt to answer Y is always helpful. It's true that sometimes you might be wrong about Y being the real problem, but answering both X and Y doesn't solve that - sometimes the real problem is Z.