This is only valid for BoE items.
Epic enchanting mats, shouldn't be flooding the AH like they currently are.
Also it's not a gathering perk, it's part of the profession. It enables us to make our mats. Perhaps the answer to this would be to make an enchanting mats profession, to harvest nodes of something to obtain dusts and so on. And so what that we have ring enchants... other profs have perks too, such as Inscription with shoulder enchants, or BS with their gem slot and so on.