It's the product of human virtues, not of vices of a life-affirming ethic, not the ethic of a hermit. The whole history of capitalism shows this. The creative and productive giants of business boosted output and caused plummeting prices, permitting customers from all walks of life to afford the new and improved. The creators did this while profiting indeed, to earn a profit means to create new wealth net of resources consumed in production. This is the new pie, not the fixed pie.
Production is neither theft nor exploitation.
The stupendous advances of capitalism made most stupendous by its biggest companies was completely ignored or derided by Marx and his cohorts in academia and politics. Those who claim that the little guy has no chance under capitalist competition, that the man of limited means but big potential, big ideas and a few commercially viable products will get nowhere or be squashed by the giants well, these critics ignore the crucial role of capital markets. Under capitalism vast pools of savings are directed by investors into all kinds of new products and ventures, so long as they can project a reasonable rate of return. The return on investment, not its size, is what counts. No one in the business world even heard of Bill Gates in the late 1970s, when IBM and DEC were both considered insurmountable computer behemoths.