alt Hacker News>The fact of resource extraction from society and externalities like pollution not being counted by capitalist because they "can’t count them" and just bundle them as externalities demonstrably destroy any concept of non-zero sum game
The article explicitly addresses this:
The fact that Capitalism is non-zero-sum doesn't mean it is necessarily positive-sum. An economy that gets out of balance can produce very negative results (which are still non-zero). Cons of capitalism: — Can not be relied on to provide adequate social services, including healthcare and education. — Can be expected to run at a cost to externalities like the environment. — Can produce products that are detrimental to well-being.
Steel man: GP could be using "capitalism" to refer to the distribution of capital - financial markets - rather than the entire system. Financial markets are zero-sum as they don't produce anything and their consumption (wages, electricity, etc) is paid in by their users. They can influence wealth creation asnd destruction but that isn't part of the market itself.