You don't exactly need farming as long as you own an Apple Tree, and are churning out sausages from hunting.
Indeed, full industry would be a wise idea to whoevers handling the smelting, forging, and other such metal crafting.
While those who have FULL NATURE are just important, if not more than the miners and smiths, as they provide our food. You can't run an efficient community without a balance between Pro Nature and Pro Industry.
It just can't be done. Those with Industry are in number, and thus require a large amount of tea and food to fuel their mining expeditions.
Those who handle the farming are allowed to take private projects because the miners and smiths are providing THE HUNTERS with equipment to keep the farming members of our community safe from foxes and boars and bears. Its a process to repeat it self, and as more and more people learn how to defend themselves, the less they will have to drag hunters half way across the map.
This in turn starts three things full drive.
1. The hunters who are no longer required FOR EVERY SINGLE FOX ENCOUNTERED will have time to build their own homesteads.
2. The farming members who know how to defend themselves once again have even less attachment to the circle, but now they don't have themselves geared to industry, which they need to metal working. This is why they still stay with the Pro Industrious people. Because the Pro Industrious people no longer *need* to forward every bit of processed metal in need of the hunters or mining equipment. Now they have their own private supply as they mine out their own ore. This allows them to provide the now not so defenseless farmers with needed equipment, while they provide them with the fuel needed.
This cycle continues as far as possible, until both remaining parties have gotten as much as possible out of it.
Soon the majority will see they have ALL the equipment they need to strike it out on their own, only coming back to the previous community to keep the fire going, and perhaps lending a bit of time to harvest or smelt some stuff for the people still living there.
So as soon as this process is done, in the end you notice that the larger community has grown into several communities all linked together over a larger area.
This doesn't really mean that Bottleneck will suffer neglect, despite the drop out of people LIVING inside it.
Most Bay 12ers see Bottleneck as the main settlement where most shit gets done. They won't abandon the outpost. Not now or later. At least I don't intend to.