Second, I think there is distinction between [your] ability to receive force and [your] ability to exert force. Striking is an exertion of force. The assumption of predatory response is going to suggest that victim selection is based upon a favorable odds of success. To avoid victimization, we do what we can to tips the odds. Striking is a tactic can can do this, independent of our ability to receive abuse during the attack.
Not sure I follow this. If you're in a situation where striking is appropriate, victim selection has already occurred: the attacker is within striking range and has committed some overtly threatening act.