Your example has nothing whatsoever to do with what I said. Wikipedia is an encyclopedia; it's primary (i.e. immediate) users are the readers who consume the materials.
StackOverflow is a Q&A site. Asking questions and receiving useful answers is the primary goal, and therefore the immediate users are the askers.
You might think that, but it is my opinion that the immediate users of SO are the readers, not the askers. The askers are but a small minority of SO's users. It's the readers coming into SO from Google that are the primary audience. Therefore, the site should seek to serve them.
Ultra specific homework questions do not help the immediate users (readers) at all which is why it is frowned upon.
StackOverflow is a Q&A site. Asking questions and receiving useful answers is the primary goal, and therefore the immediate users are the askers.