Q: What is the interest in this Kantian-Buddhist analysis? Why is it the highest good to do this type of thinking? Why is it so pleasurable? And why is it so valuable? Why is metaphysics valuable (if it is)? When is metaphysics valuable?
A: When it addresses impact—when it addresses the stuff that resists our push and pull. The stuff that hurts us and causes pleasure/pain. The stuff that causes sense presence. We have an interest in that—because it causes pleasure/pain. We have an interest in what resists the will. The imagination, which expresses the will immediately and without resistance, can never be an object of interest.
Whatever obeys the will perfectly is transparent.
Whatever resists the will arises as a possible source of value.