Observing the behavior of many community members about closing votes, I feel more and more doubtful about the coherence between the rules written in the help center and the practice. The last example is the case of this question closed a few minutes ago, as homework-like and check-my-work.
Re-reading the Meta page on How do I ask homework questions on Physics Stack Exchange?, I have difficulty seeing the difference between the above question and the examples indicated on this Meta page as examples of good homework questions. In particular, the problem is clearly stated; the steps to solve the problem are shown; a strategy to overcome the problem is provided, and a conceptual doubt is clearly stated (the final sentence "I guess that we are dealing with energy which is a scalar quantity and hence signs should not be used. Not sure of this, though.")
What else is missing? Why is this question not acceptable according to our rules? I feel that the reasonable policy against bad homework-like questions of limited interest is sometimes transformed into a conditioned reflex to close every question related to exercises, independently of its actual content and quality. Am I wrong? The community can favor such an approach, but the stated policy should be consistently modified.