Yes, often an issue on stackoverflow. It's one of the reasons why it can be frustrating to use as you get more experienced: if an expert is at the point of asking on stackoverflow they're probably doing something at least a little bit unusual! But people who answer on stackoverflow mostly see questions from less experienced people and so default to operating in that mode.

I generally try to answer the Y but also indicate that it suggests there may be an X that could be better achieved some other way, and mention Z if I'm reasonably confident in what X is. It might increase the chance that the person asking just does Y anyway even if Z would be better, but frankly that's not really my business.