Dear Martial Artists what do you say about this ?

Though I am not into Martial Arts, I would like to ask this question pertaining to certain aspects related to it. From my observation of its underlying principles, I have noted that whenever there is an aggressive attack, the very attitude of the attacker to manipulate with the weakness of his or her victims sets a stage for his or her own defeat. An aggressive attacker narrows his scope by concentrating only on the weakness of his or her opponent, whereas the victim has broad options of making the efforts of the attacker, an exercise in futility. For example, in a simple attempt to attack his or her victim, the attacker trying to punch the face of his or her victim is concentrating his or her fists to attack rather than defend. A failed attempt is a good opportunity for the victim to launch his or her own attack, specially in those areas of the body that could be effectively defended by the hands but since the hands of the attacker were being used for attack, they are not available for his or her own defence against the attacks reciprocated by the victim in defence. I know it sounds so obvious but Martial Arts Techniques have advanced with such small aspects as its foundation. The lesson to be learnt is that anyone who starts off aggressively to hurt someone narrows his or her own scope because DEFENDING as an act gives more liberty and options than a mere act aimed to attack someone concentrating on just destroying the VICTIM. Is it for this reasons that Martial Artists advice their students to not pick fights unnecessarily ? Would it be correct to conclude that AGGRESSION always meets with defeat in the long run and DEFENCE wins in the end. Please share your thoughts on this in spiritual terms.