asking for crafting materials to be put in treasure chests in dungeons is silly.

you whine because everyone is rolling need on the craft materials, yet you suggest to put them in a treasure chest so it will be given out at a random person without any choice on the matter?

at least with the need/greed system, if someone doesn't give a rat's ass about that craft material, he/she will pass it.
if you put these materials in a chest, next thing it will happen, you'll come to the forum to complain about RNG.