Why are Superior runes/sigils not forgeable?
Probably to avoid re-rolling for more expensive and useful sigils.
Ok, but people can do that with many other things. Why would it be a problem for Sup runes & sigils but not for rare runes and sigils, exotic weapons, etc?
With rare runes and sigils you have to deal with the pool of simply getting another rare or the pool of exotics. So the chances of getting a better sigil and rune are alot lower there.
As for weapons and armor there, i can only assume to give people a better chance at obtaining precursors which are extremely rare to find as a drop. Otherwise, no idea.
Random rolls on a guaranteed superior sigil would seriously influence the cost of them on the TP. The short term profit you would get from making new ones would be countered by the drop in exotic gear values and price of T6 mats.
It wouldn’t just be the value of one type of item that would change it would trickle down thru the entire economy because the materials that would increase in value are also used in many other aspects of the game.
GW2 has an insanely intelligent economist behind the scenes, if making them forgable was something that wouldn’t have a negative effect i’m sure it would have happened a long time ago.
~Dr. Seuss