You have to think about why questions get closed for being off-topic.
The first and main reason, even if it is the unofficial one, is that people were tired that math.SE was becoming "Do my Homework" Grand Central. The close reason has not been successful in preventing this change, but at least it has reduced the flow of questions that have been asked 36,000 different times (hey guys how do I compute this random limit without l'Hôpital's rule???).
High-level questions don't flood the website, far from it. They are less likely to have been asked billions of time.
There is a certain legal principle in some jurisdiction. If I understand it correctly (I'm not a lawyer), it says that if you edict a certain rule, and when interpreted in some way the consequence of that rule is clearly absurd, then you should not apply the rule in that case. I find it utterly absurd that we, as a community, would deprive ourselves of interesting questions on advanced topics just because we edicted a rule to prevent people from taking a photo of their homework assignments and posting them here to get someone to give all the answers in order to acquire some Imaginary Internet Points.
Then there is the official reason. What does the close dialog say?
This question is missing context or other details: Please improve the question by providing additional context, which ideally includes your thoughts on the problem and any attempts you have made to solve it. This information helps others identify where you have difficulties and helps them write answers appropriate to your experience level.
And the official FAQ?
Context matters. A question can sometimes be answered in one sentence when the discussion is between two experts familiar with each other's background, while the same question may take many paragraphs of detailed computation when being shown to an undergraduate student. By providing a context you help the potential responders to your question give you the best help you need.
When we're talking about an advanced question, well, there's only one level you could be at. Advanced. If the question can really be answered in one sentence, then great. Answering a complicated question about representation theory uses the same tools whether you're an advanced undergrad, a graduate student, a postdoc or whatever. And if it can't be answered with such tools, there's MathOverflow.
Moreover I claim that such questions carry some measure of context within themselves. If you ask a question about representation theory, I know what the context is: representation theory. So the answer will be using definitions, properties, propositions, theorems... from representation theory. Someone has to know this context, or else they can't even understand the question.
Of course, I'm assuming that the question we're talking about isn't just a mere imperative statement (as someone pointed out in the comments). If it sounds like the question asker is assigning me homework, then I vote to close. But if it sounds like someone is stumped by an interesting question on an advanced subject, that's something else entirely.