Random hit location probabilities

[Phex]

I do not quite understand the probabilities of the random hit location table on page B552 from a simulation perspective. What puzzles me is the asymmetry of the left and right hand side.

left arm     11.6%
left leg     16.6%

right arm     9.7%
right leg    11.5%

torso+groin  36.6%   (for comparison)

Shouldnt the right arm, which is the weapon or near arm, not be more probable to hit in a fighting scenario? Similarily, why is the left leg, which should be the far leg, easier to hit than the right leg? I think I would personally prefer an equal distribution between the left and the right hand side in most cases. But when there is an asymmetry it should at least represent a typical fighting scenario with fighters facing each other with the weapon arm in front (like in these old rules). Or did I miss something here?

I have already searched for this topic without success, but most likely this has been asked before.