SO incentivises some stuff. You ask a question and you get points if other people upvote your question. You answer a question and you get points if someone upvotes your answer.

You can't vote on closed questions or answers to closed questions.

A question can't just be closed. There needs to be a reason to close it. "This question is a duplicate of this other question" is frequently used. Often the questions are similar but different enough to need a new question. You can't ask a broad question to capture all the variation - that'll get closed as too broad. You can't focus in on your exact problem -that'll get closed as too narrow. The gap in the middle is full of dupes. It's pretty demoralising to have people picking over your question and closing it for (seemingly bogus) reasons or asking for pointless clarification.