Players need to be able to support themselves with professions and alts really is the bottom line. With mega servers and botting it’s hard to get terocone / other open world resources.
Gold farms are a bandage that don’t really solve the problem. More gold, more bots, rare supplies skyrocket in price. As more and more people opt to buy resources those without a network of toons to make gold suffer.
If you could farm terocone (and caster herbs) reliably in a dungeon everyone would be a gold cap.