Nothing of what you said has anything to do with the concept of "zero sum". It has to do with if the resources in a system are fixed or if they are changing.
The data from the Fed show great inequality which can be expected from a zero-sum game. Another example check how under develop DR Congo is in the electronic age, while hardware (and to an extend software) companies are some of the most valuable companies, they all source raw materials from Congo.
Capitalism isn't zero sum because at its core principle are transactions, which are inherently non-zero-sum.