Well we are talking about different things. You are talking about a fight, mutual combat. You know that there is about to be trouble.
I am talking about a person just minding their own business walking along and bam out of nowhere they get mugged or jumped from behind. You don't expect it nor do you see it coming.
Now if you can't take the first hit then you are in trouble.
gotta agree here. Most of the time the first hit wins the fight.
If they hit you with anything hard like a pipe you may not be taking the hit anyway however.