Hmm you might be right then. I was mostly going off of this from the first post:

First Attack Bonus does not exist!
Also, if two people have the same amount of enmity, the enemy goes after whoever targeted the enemy first.
However, speaking from a GLD's perspective, I guess it's important to get the first strike in order to strike a combo and grab the enemy's attention...
The large enmity gap thing probably won't be that big of an issue at the end of the day and maybe it is there to help tanks get hate back in case they die.