So you would rather teach a student to increase the angle off attack at low level instead of teaching them to lower flap when they know they can safely make the landing spot
Good grief man, people make mistakes. Teaching them to fix mistakes is what an instructor is supposed to do.
Aircraft stall when the critical angle of attack is exceeded - not at a given airspeed.
And in 1-g flight, the airspeed is a measure of AOA. Heck, at any steady g-level, airspeed measure AOA, but the airspeeds are just different from 1-g flight.
I'm giving you good information here. If you teach "never raise the flaps", you're teaching rote memorization, rather than giving a good understanding of how an airplane flies. What I'm telling you works; go up to altitude and experiment.