That is the underlying theory of copyright law. We make the speculation that if we don't have copyright law then people won't have the incentive to create futur

That is the underlying theory of copyright law. We make the speculation that if we don't have copyright law then people won't have the incentive to create future works. A world without copyright would however save more than just a few millions of man hours that copilot might do. Allowing people and companies to freely use the best software available, view the best art, enjoy the most relaxing music, have the best recreational time with the best films. The only harm is the highly speculative claim that people won't be creating the best software, the best art, the best music or the best films.