There are other communities where asking a question to which you know the answer is actually encouraged. WikiAnswers, for instance, aspires to have all the answers to all the questions, so the objective is to create a question for every possible answer (I know, but there it is) so they will always get Google hits. Some of their community supervisors spend huge amounts of time generating questions for single discrete, searchable units of information such as lists of state birds (one question per state) and every known fact about clams.
That is not the point here. The point here is to seek answers, often somewhat more complex or obscure answers, from people who know the subject and can respond directly with the information you need, especially when it’s not a straightforward, searchable question. It’s also to have an exchange of thoughts and enjoy the interaction. Some questions do involve opinions or polling, and they are welcome when they are framed so as to generate interesting discussions.
So as Judi says, it’s not a matter of any absolute rightness or wrongness. It’s a matter of acculturation to the Fluther community.