Because I want to give you the chance to exercise your mind. I want to see if you can figure out why.

Your prediction of consumer behavior does not have an effect on demand, despite the fact that you think it does. Recall that we are discussing scarce natural resources, the operative term being scarce. Scarcity implies that only a very small subset of the population can afford the resource, and that subset is the very wealthy. Although the price of the natural resource is astronomical to the average person, it is affordable to the wealthy. As scarcity increases, it's demand relative to supply does not necessarily decrease proportionally. It would if all consumers had the same wealth, but that is not the case.

Regarding harvesters, let's not call them suppliers, as it hinders one's thinking. By using the term harvester, I gave you a big hint as how to rethink the problem, but you opted to insist on the term supply, in hopes that your supply/demand theory would then still be relevant.

Harvesting determines supply. A significant increase in the scarcity of a natural resource drives the price higher. This makes harvesting more appealing. Any and all of the following will typically manifest themselves as the price increases significantly: increased efficiency, increased application of sophisticated technology, criminal activity, unethical activity, immoral activity, and collateral damage. Competition increases. The race to harvest the last remaining quantities of the scarce resource ramps up.

This happens every time in an unregulated market.