The worst XY problem is knowing you want to do Y, even if its strange or whatever, asking how to do it, and people asking you "why do Y? Do X instead". Happens all the time in Stack Overflow. Just answer the fucking question, and then give the lecture on why you think it should be done that way, or why it shouldn't be done at all...
There are a few people who frequently have this complaint, but I don't think it's a real problem. If you actually need to do Y in a situation where most people who think they need to do Y are wrong, it's not everyone else's responsibility to divine that you are the magical case. It's your responsibility to demonstrate that you actually do know what you're doing. This isn't something you do by discussing how unfair ot…
and the question was marked as a duplicate of a "how to do X?" question and closed.
I've also had plenty of good experiences on StackOverflow, so YMMV, but in general I've found other forums better.