Creativity and production are part of what make us human. But for many of us our creativity and the products of our labor are turned into commodities and sold by someone else in the market. No economic system that allows this can be called sustainable.
We sell our labor and our lives to the bosses who use us to accumulate riches and buy politicians and governments which become the instrument of oppression against us. Capitalism dehumanizes us, turning us into profit making machines.
In makes no difference whether the economy is green or fossil. What makes our current economy unsustainable is not just the way it gobbles up the earth’s resources and poisons the atmosphere, it is unsustainable at its root because it commodifies the the creativity of workers, a huge aspect of what makes us human. Capitalism has no role in the building of a sustainable economy. We need a new system.