I agree with you, if I am interpreting correctly, though my view is from a different, more physical direction, the conclusion is the same, and I don’t much like the term capital to describe the organism of humanity. To me, capital is stored energy, whilst humanity is the organism, interacting in the environment of stored energy.
Right now, the organism of humanity is undergoing a birthing process; the process of switching dependence from stored energy (the capital of Earth), to live energy, in the same way as a human baby switches dependence from the limited energy of a placenta, to the raw, limitless energy of its environment.
The live source of all energy of our environment is the sun.
We are switching from the limited capital energy of our environment, to the unlimited energy of the sun, as we have to, since effectively our planet is in process of severing the umbilical cord of our dependence on it for energy.