You don't. You need an advanced economy, that's what I was pointing out. The ornamentalsmith actually uses titanium ore, but since we don't have (yet) titanium mines I think (my opinion, not fact ) they substituted gold production as an indicator.
I can sort of understand people being anxious to complete any quest they are given - it's an OCD thing for me - but some quests just have to be done when one is ready, and this is one of those. If people want to build enough buffed lvl1 gold smelters, then fine, but then they will just be presented with quests to build advanced paper mill and ornamentalsmith and those WILL require 6,000 granite.
Anyway, back to the point... I don't think the 1,200 in 12 hours rate is a mistake, I just think it's a high hurdle to clear before opening up the next quests.