This is in no way aiming to be a flame and/or rude post. Just my
opinion and a possible scenario:

-Green chest item drops with 50 defense and DoW can use.
-Tank rolls need, gets, equips.
-Next boss a green chest item with 200 defense and DoW can use.
-Tank rolls need again, gets, equips.

MRD can roll need on both, LNC can roll need on only first item.
MRD wins both. LNC is pissed. Therein lies the problem.

That aside, I'll be a monkey's uncle if I am going to run level 50
dungeons with a tank that has 300 total defense as compared
to 1000 because he decided to roll on a bunch of items just
because they have upgraded stats but the defense is atrocious.
***Just throwing numbers out there as comparison.