WHy the average guy? What about us girls? We can fight too you know (OK, not as easily as the guys, but you see my point)! It's a combination between aggression, strength, technique and strength.
Now now. Requiring everyone to constantly make the distinction is pushing the point.
If the name of the Thread awas "The Average Guy or Girl on the Street", then someone would complain about calling Girls Girls instead of Females or Women, and so on and so forth. You know what the OP is talking about - Focus on the Discussion.
Now, to reply to the end part;
Aggression is a factor, albeit Defensive or Counterfighters can be damn efficient at what they do. Additionally, if You are Aggressive, You can lead anyone to believe that even if They attacked You, that They are now Defending Themselves, hardening their resolve, and intensifying their intent. That said, I favor Aggression. Just not for the purposes of thinking itll make Me mystically overwhelm someone.
Strength is a Factor, to a point. But then, if someone is Fast, they can land a blow which can lead to more Powerful shots.
In Fighting, Technique is irrelevant. Never mind Adrenaline, Anger, and Surprise; The concept of using Techniques is foolhardy. Unless Youre Mistaking Techniques for Basic Movements, such as Punching Straight instead of Haymaking. But then, some People can throw pretty continuous Haymakers, with good recovery time. To rely on Technique, is foolhardy. Body Mechanics resulting from Technique? Sure. Expecting to be Technically correct in both the Movement, Application, Timing, and Targeting with Accuracy is futile.
Strength being listed again is a null point. You can take the biggest, strongest
person (So now how if I said Man, Youd have thought, or girl? This is why You dont press the point. It can lead to unnecessary debate which deviates from the topic) in the World, and hit them. Even if it doesnt maim them, it will hurt them. Even if you take someone who can absorb hundreds of Punches and Kicks and Elbows and Knees to the Torso without even flinching, ask them if it hurts. Because They feel it.