Anthony, your response again demonstrates your fundamental ignorance about
flying. Since when do throttle and RPM control EGT? What does EGT have to do
with engine performance and longevity? Since when do full throttle and RPM
produce maximum EGT?

It's a good thing you actually don't fly. The limitations in the POH
obviously would not make sense to you, since you don't have a grasp of the
fundamentals of engine operation.