I don't see how adding this will create more harm than good, personally. People already don't check their gear when they go into dungeons, this is why this feature is requested occasionally. Making it sound like adding this will bring about the apocalypse where no one checks their gear anymore sounds exaggerated to me. Especially since there is no guarantee that you'll have a crafter who can fix your particular gear for you in the dungeon you're going into. If you want to wrap this up in a nice bow all together, make it so that the dark matter used has to be in the inventory of the person requesting the fix rather than the fixer and leave gil out of this outright. I don't think this will wreck things so much as give certain groups a way to continue with their content when the tank with their instant queue didn't see the notification their gear is broken.