They don't have any real reason to be done any more. You used to do them for ARR and HW relics, either as a quest or for the seals they gave, but now you need neither. Verity tomes are useless now, and poetics are easy to get. That made the roulette have no real value save for exp, and it's pretty bad given the time you wait.

I expect the next relic shockingly will have us farm tomes or run dungeons when they realize this.