Reason won't stop someone who is angry. That part of their brain is literally not engaged (limbic system overrides the executive center). And I won't stop to talk to someone who has a kinfe and is using it to try to hurt me. If I get a chance to break the arm holding the knife, I will break it. In NGA (remember, not a derivative from Ueshiba, but a cousin art), "aiki" is not a concept of philosophical gentleness, just one of physical blending and using the momentum of the attack.
Now, if my initial response puts them on the ground and under my control, the game has changed. Once I have control, I can afford to become gentle. If I manage that without doing harm to them, I prefer that, but I don't actively change my approach during the attack to avoid their injury.
I think physiological processes arising from limbic system cannot be engaged forever.. peak then fall, this is not correct? Like anger is a flow it cannot be a perpetual state.. it cannot be maintained without stimulus.. If you persist violently with someone who is angry then YOU are the stimulus, yes??
Is not impossible to have compassionate intent for someone who apparently wish to harm you, you do not agree?? As martial artists we have no obligation to consider these things???