People don't upvote questions because they do not inherently create any benefit to anyone. if no one has the answer or answers the question the post is effectively uselss. It offers no value. if it sparks up a debate or answers you can then expect upvotes from interacting in the comments.
You can also do a follow up post on what you learned but upvoting questions would be counter intuitive to the reward system and would be very much open to abuse
People do upvote questions on Musing! I can see this question is 5 months old now and maybe things have changed...
I often get upvotes on my questions - i try and write questions that are multi layered or ask for deep insights from users. Obviously those questions that have been asked a million times wont get any upvotes as they dont add any value to the platform!