Reduce power and.... Stall. No increase left, at max altitude, can't climb, At Vne can't descend, you going to do uh What?? Including the word Coffin is not a mistake. rubik: more power than wing has killed many an inattentive pilot.
Airfoil you can reduce power and use attitude to maintain airspeed. Airspeed is the critical factor.
Just don't apply for a job as a carrier pilot if you don't understand that sink can be controlled
EITHER by attitude or power. You add new lustre to the term plain driver ... sorry I meant plane driver.