Thank you for your feedback.
With regard to 'How many people in an actual fight wouldn't fight the lock?'
I have been taught in my club to relax and not to fight the lock as to not cause injury. Anyone not trained to do that i.e in an actual fight, would fight the lock and that is why the lock is effective.
My arguement is not against using Aikido to harm in order to defend yourself, for Aikido techniques allow you to make that choice. I am against showing techniques which can only harm, not control.