Actually, I always thought the racial differences should be bigger if anything. At about Lv75, racial stat difference extremes range between 7-14 points. From a real life perspective, if you took an average person, a person who doesn't perform physical activity, and a Galka-like workhorse, they'd have a comparative difference of at least, without exaggurating, ten times that. A Lv30 tarutaru monk is still a tarutaru compared to, say, a Lv5 Galkan thief.

Then again, I always took this a step further and thought it'd be nice to take individual variation into account as well; a hume red mage who also practices Warrior arts a lot should have higher physical stats and lower magical stats than a hume red mage who spends their free time calling avatars out of their eternal slumber and slinging them back repeatedly outside Jeuno.