How do you know they are not trained?
How do you know they are not drugged up?
How do you know that they are not faster then you?
How do you know you can actually foresee the attack?
How do you know you could make a dodge?
How do you know which way they will come?
How do you know it is not a feint?
How do you know it is not a deception?
How do you know it is not a combo?
How do you know if he is alone?
How do you know if you have help?
How do you know if you are in the right?
How do you know he is not better than you at fighting?
How do you know he hasn't go weapons?
How do you know if he is armored?
How do you know he is going to attack?
How do you know?- You don't.
A. you can only defend yourself from an attack- that means he has the edge, because he takes the initiative.
B. Every move you make CAN be countered. there is a way out of everything
C. You now have to respond or be contempt to block and parry all day
D. If you block and parry all day you only need to make one mistake...
E. You WILL make that mistake.
street fights are one of the hardest things on earth. Pitched battle- no problem backup left, right and center- if the technique doesn't work disappear to fight another while the allies deal with him.
In a street fight you need to be able to move in whatever posture you find yourself in. Kotegaeshi is the best. You can do it on the cut, you can do it on the jab you can even move to grab them and do it. thats my opinion along with the facts above. May be wrong, but it has served me well thus far.
if you are going to do aikido in a street confrontation then pick the simple, quick trows that send them down for the count.