Hudson very interesting question!
C Prop, even if you have one im not sure completely addresses the problem. To the best of my knowledge Boeing test useing half worn cold brakes, Im not sure there is any data available, other than advisiory for any other config.
Quick turn and brake cooling schedule charts only, as im sure you are aware adress the fuse plug issue and not the ability of the brakes to absorb the energy during a high speed abort, I believe crews are misled in this area.
I personally agree with your Boeing instructor, and while i dont actually touch em I do get close!
What do I do about it, as you said try to plan a landing which will result in the coolest brake temp, and rarely flex after a short landing with a quick turn.
I am interested to hear views on releasing brakes after shutdown.
Rgds