I agree that this is a problem. People do "need" for greed.
people often forget the spirit of what the buttons are originally meant for.
Need is for a gear upgrade for whatever you're currently running the dungeon as.
Greed is not needing it, but wanting it for money/other purposes.

Even for Vanity gear i will only greed things, especially if someone else could actually use it as an upgrade.
I have no respect for anyone who Needs on gear that could be an upgrade for someone else when it is not an upgrade for yourself.