The exact same question you're asking can be extended to a loot-centric grinding endgame. What happens once you get your loot? Do you stand on the ship, linking the loot in chat? Do you regrind the same raids you just spent all that time grinding to get the loot? If people are willing to regrind raids once they get all the loot, then why must raids be constantly developed with the best loot to get people to run them? What happens? All non-pvp games reach a point where there's nothing left to do. TR at least gives you the ability to continue playing the game with the same identity. If that isn't for you, consider the game won and move on. There's nothing whatsoever wrong with that. I've quit playing many games due to this exact reason.