Explain how matter throttles its radiations dependent on the temperature of distant objects.
If you have to say "It's an unknowable, I think you should resign this argument for all time.
Explain the fundamental mechanism for gravity...seems that it should be much more simple than energy transfer...and yet, we don't know....you don't have to know how...or why....in order for a thing to be true...and since the mechanism for gravity is at present an unknowable...should all discussion of gravity be suspended till we actually do know?
Stefan and Boltzmann derived their laws of black body radiation in the 1880s, long before the atomic and subatomic mechanisms responsible for radiation were known. The behavior of gravity is VERY well characterized by the understanding we have of it right now. Several theories exist concerning its actual mechanism but are beyond our capability to test. This does not get you off the hook.
You claim that all matter is somehow capable of restricting emissions in directions that would allow those emissions to travel towards a body of a higher temperature. Besided being absolutely ludicrous on its face, this concept violates special relativity. And that is still ignoring the lack of any CONCEIVABLE mechanism.
There's an idea. Just give us some wilid-eyed, top-of-your-head, blue-sky-dreaming, W-A-G ideas as to how matter MIGHT know the temperatures of its surrounding, no matter the distance, and control the direction and the intensity of its emission in response. And if you can think of a method that does so without requiring all matter to be intelligent, so much the better.