Brd may lack the job traits, but lets be real here, in a lot of cases those same job traits can be earned from sub-job, and brd can also substantially buff themselves to make up those magical missing traits. For someone who slings the "you must be dense" comment, you sure are narrowminded if you assume that jobs only have one or two purposes or abilities, and it is these same reasons drk K-club zergs, rdm chainspell stuns, and other well known tactics were developed, and saying that gear has no effect on something like that is completely wrong. Granted i did missread your statement, but the same jobtraits you cling to in many cases do very little baring some exceptions. But to humor you lets look at these traits.

Fencer, brd gets it, but im sure that is not counted as one of your DD traits, dispite it raising crit rate while single wielding, so yank that sword (which should be offhanded, but AH is a bit picky about slot placement) off and keep the rest of the gear or stack their equally impressive dex gear for evisceration.

Critical Defense Bonus. Sure its not a damage dealing trait, but it is a frontline trait. Once again, brd gets it.

Resist silence. Granted not a melee trait, but allows them to buff themselves.

Now lets look at some of the other argueably "DD" jobs.

BST.
-Killer traits
-Widescan
-Fencer
-Stout servant
-Resist Slow

Im sure those killer traits make it more DD related than brd. Im sure it has nothing to do with its gear and weapon choices. Course thats assuming bst is only designed to melee itself, not wear pet related gear at times to enhance their pet.

Lets escalate this some though and look at a much more recognized DD job.

Warrior
-Defense bonus 2 (22 DEF)
-Double attack
-Attack bonus 1 (10 ATT)
-Resist Virus
-Fencer
-Critical attack bonus
-Shield mastery
-Shield Defense Bonus

No argueing that war is more skilled, or a better damage dealer, but those traits you cling to, brd can sub war to get half of them that wont impact its main job. Including its double attack.

As for its attack bonus or defense bonus, or accuracy.
-Valor Minuet V grants upwards of 72 attack.
-Knight's MinneV grants up to 60 defense.
-Blade Madrigal gives 30 accuracy.

SO while lacking the native traits, it can get superior to the very traits you specify through sub and 2-3 buffs, and can gear like a DD, is it a DD? Nope, can it be one? Sure. Could the same to an even greater extent be given to any job at any time via JA, JT, MA, or other source causing the jobs to deal more than any other DD? Its unlikely, but its not impossible in a virtual fictional world. Get off your high horse and stop weighing in on things that extend outside your narrow field of perception.