Note, I do not have close-vote privileges, so instead I have to use flags. The flag menu has an explicit "this question should be closed" submenu.
I flagged this question for closure with the custom reason:
Close for future works? The answer is "no" right now, could be completely different (and obvious) next week.
This was declined with the message
flags should only be used to make moderators aware of content that requires their intervention
Surely that's wrong? If flags are not supposed to be used for closure, why is there a whole UI supporting it?
Why was this flag declined?