The laws of physics and the causes of problems aren’t about being a “convert” or the “benefit of the doubt” (and more fool you and your wallet in giving the benefit of the doubt to engine manufacturers).
You’ve identified “heat” as a (or is it “the”?) cause of detonation. OK then, on your superior knowledge:
1. At what mixture setting is cylinder head temperature at its highest?
2. At what mixture setting is exhaust gas temperature highest? Is it lean of peak, or rich of peak?