Oh, believe me, I know how to look after myself.
I believe your stance does need justifying, and so far you have managed to provide sod-all, except this bit:
obviously forgetting that the even 'small' bloke is more likely to be stronger than the girl and is likely to do more damage
which is true to a small, insignificant extent - a bloke\girl of equal weight will almost certainly have similar force \ inflict similar damage if they put in equal effort.
So if you want integrity, other than from those who share your bul****ting generalisation-convention attitudes, you do need to provide some credible justification.