100% food self-sufficiency is a useless measure of whether a country has reached it's carrying capacity. As long as you can trivially import food it doesn't mat

100% food self-sufficiency is a useless measure of whether a country has reached it's carrying capacity. As long as you can trivially import food it doesn't matter. Which is easily possible for Germany. Now take the Netherlands for example. It has a self-sufficiency ratio of 54%. By your logic it should have a MUCH lower birth rate as Germany. Yet the number is almost the same (Germany 1.540 vs Netherlands 1.570). This also doesn't square with the population growth due to immigration Germany has.