I think we can’t exclude emissives completely. You are right, we were talking about that. Here, for, example: Possible to turn off Emissive Material for Lumen GI? - #22 by Miguel1900
Apparently (if I’m not wrong), you can exclude them from RT traces with one of the commented tricks, but Screen Traces will be still there, causing even more noisy patches. (And disabling all global screen traces shouldn’t be an option).