Planetary "carrying capacity" is not at all well defined. It depends on too many things like natural developments (think year 536), how the economy is organized

Planetary "carrying capacity" is not at all well defined. It depends on too many things like natural developments (think year 536), how the economy is organized, and powered, where and how many nukes have exploded, the quality of life, unforeseeable technological and scientific developments, dynamical ecosystems, ... So I'm curious what you mean by it? And how can you declare there's "basically no risk" when we still have superpowers with atom bombs going to war?