Well, we know that getting help from Stack Exchange for homework is a complete no-no. But what about discussing the interpretation of a particular question?
There is absolutely no reason whatsoever why homework problems should not be on here. In fact, I strongly encourage students to use math.SE for their homework problems! I believe this is the view held by most people.
However what I am strongly against is dumping problems, which most likely come from homework, but this is not a necessary condition.
I don't care whether a problem comes from homework or not. What I care about is whether the asker shows effort, regardless of whether it's homework.
There is no reason why asking for help on homework, including how to solve it, should be banned.
Discussing interpretation of homework problems is always 100% on topic here.
To clarify, when you read "homework problem", you should read this as "homework style problem". No one can check or even cares if it actually comes from homework.
I think an Asker who posts a Question that articulately considers the interpretation of an exercise is doing something right!
In my view the Asker is ultimately responsible for clarifying the interpretation of the Question that is being asked. We can help with Questions that ask about interpretation of exercises, e.g. what does a term mean in the context of a particular subject in mathematics, or what interpretation of a problem makes it trivial or nonsensical (so probably not what the original problem autho had in mind). Still, the Asker needs to be able to tell whether they are being given good Answers. If they cannot tell, it is perhaps because they did not cover the basic definitions for the terms used in their Question.
I welcome thoughtful Questions about interpretations of exercises, and I abhor the "pass-through" bare problem statement questions.