I know people sometimes write unclear questions. I think some of them can never figure out how to make their question clearer. I think for some of them, the only way they're ever going to learn is if somebody makes an attempt to try and guess what they're confused about. Then they might slowly learn from experience how to write a question in a way that will get them the answer they were looking for. Also, sometimes they might resolve their own confusion later and might then answer their own question explaining it and mark it as accepted but that can't be done if it's closed or deleted. Once they do that, that might also give other Stack Exchange users insight on what types of answers tend to solve the author's problem.
Everybody has a limit in how much quickly they can gain knowledge. It may be a good idea to adopt the following point system with points that are distinct from reputation points and are more like money where you can buy something if you have enough. Everyone has a site specific point system for every Stack Exchange website and a network point system. A main site is completely distinct from its meta site for points. Everyone starts with 1 point on each of them. On each website, their number of points for that website goes up by 1 every 30 days until it reaches a maximum of 5 and it goes down by 1 each time they ask a question on that website. Also, each time they ask a question anywhere on the network, the number of points for the network goes down by 1 and it goes up by 1 every 30 days until it reaches a maximum of 5. They can only ask a question on a website when they have at least 1 point for that website and at least 1 point for the network. Investing less time studying one subject doesn't seem to enable you to increase the amount of time you invest in studying a topic you're already investing a lot of time in by much.
This way, people will ask fewer questions for the amount of knowledge they gained and they'll have more of a tendency to all be unique and different. Also, more attention will be drawn to each question on average. As a result of more attention drawn to each question, some people would have so much time to invest in a single question that if they had the right skills, they could figure out how to interpret the question when it's unclear.