Like I said, if you are trying to draw 100# you arm wants to collapse (eg. The elbow wants to bend), to counter this you have to do something...They are equal yes, and opposite, yes but the bow arm is not in line with the force acting on it towards the draw hand. The bow arm experiences a pull across to one side... to the right for right handers. What is the opposing force that keeps the hand from moving across to the right?
At which point we are in the murky area of:-
2. The difference between what we do vs what we think we do.
3. The actions we visualise or initiate to achieve a desired result.
For me it's pretty much pushing that bow hand away and slightly back.... it's definitely not trying to straighten or lock the elbow.
It is self evident that an opposing force must be applied... what one decides to call or how one instigates it is maybe irrelevant.
It's like coaching in general, it's finding an explanation or description that works for the person involved.
"Punch my fist out at the target" works for me, whereas "let your bow arm be like wet lettuce" wouldn't