Unfortunately the patent system doesn't account for how business works in the real world - companies copy each other, and that's how competition is born. If everyone had to do everything 100% different, they wouldn't be competitors in the same market anymore. They would just create tens of other markets, where they'd be the only company making that type of product, and most of them would probably fail, because competition can actually be good for the first mover, especially if the idea is too crazy. They can validate his idea, and more people will switch to that idea of a product.