I must be missing something here - how is disliking magic item wish lists a dick move?
Or does the dick-move part lie in not fulfilling the player's adventure request? If done maliciously, I could see the dick part of it, but if the DM has set up a string of desert-based adventures and a player asks for something in the arctic, the player at best is going to have to wait. Even more so, perhaps, if other players have asked for undersea, jungle, and mountain adventuring after the desert bit is done.