Technology invalidates the very idea of a zero-sum economy. If tomorrow we reach a breakthrough in fusion energy and are able to deliver all the energy the world needs at several order of magnitudes less cost, material, and space... well then we just gave a lot and took very little -- the pie grew -- the possibilities grew. It's not zero-sum.
Listen, simply decrying "zero-sum" doesn't make an argument anymore intelligent. You must seek to understand the concept and basis underlying the words you use. Only then does their true explanatory power become accessible.
[1]: https://en.wikipedia.org/wiki/Production%E2%80%93possibility...