In 1.0 the lore for Gladiator, GLA purposely wore shiny gear and fabulous things to draw the attention of the enemy. I assume its just like other rpgs at that rate, the heavy, shiny, armor attracts the enemy's eye, whether its beast or human, in my middle of the battle its like "AHH SHINY ATTACK", and only the smarter beast/humans don't go straight for the tank. I think this has literally be the lore for enmity since D&D.