In raid healers and tanks have to compete loot against each other, but dps can get their loot 100% chance without rolling because each of them have different gear set, if you play caster/ranged + 2x melee as long sam/monk is not in the same party. That is what op is trying to say I think. If you play dps job, it is easier obtain bis gear than tank/healer job where you have to roll for the loot after drop.
