Except you don't farm dreadwyrm stuff expecting it to last long. The relic quest on the other hand is all about future investment, it has always been lower in ilvl than the endgame raid weapons, so the only point of the relic weapon in the first place was this long term goal component. Now, you take this and trash it by resetting absolutely everything relic quest users have done in hundreds (maybe even thousands) of hours including the secondary stat customization from the Novus questline and all you are left with is the novelty of having a legendary useless weapon.