You have a warrior with maxed 1-handed weapon skill and a pure mage that never touched a melee weapon.
Now both pick up a 2-handed weapon.
In reality, one would expect the warrior to be better with it from the start, but this is not the case without attributes. Both characters are equally good or bad with 2-handed weapons, although the warrior is a melee weapon master.
And this doesn't even take hand-to-hand combat into account, which might get its own skill again because acrobatics and athletics have been cut. A boxer that picked up a sword would be just as helpless as a wimpy Bosmer hunter.
Well, I know this isn't a very good rebuttal, but what are the odds that if your a warrior, your never going to pick up a two-handed weapon? Its pretty slim, sure its possible, but slim. A mage will probably never touch a two handed weapon, but a warrior is much more likely to.
I see your point, but I really don't think we can assume this is the case just yet.