I won't argue that copying ideas and reimplementing them cheaper/faster doesn't have upsides. But one worry is that the immediate downsides are felt by the original inventors. Sure, cheap copying is nice for the consumer and reseller, but they're dependent on original inventors being incentivized. It's not impossible for inventors to go the slow, substantive route, in which they come up with a business plan and an idea, but that limits the work of creation to those who can manage that kind of timeline.