Anti-capitalists love to claim that consumers don't really have free choice — that advertisers and peers really dictate to others what they should buy. In truth, consumers choose freely, but use others to filter information and simplify the process.
Trump haters are concerned that Trump will "stain" the Lincoln Memorial with a speech on Independence Day. But Trump is extremely unlikely to ever match Lincoln's blood-soaked legacy. And that's a good thing.
Supply, demand, and prices affect human usage of natural resources in such a way that the most scarce and valued resources are economized and preserved. The practical effect is that valuable resources never really run out.
A business owner who cannot understand why a customer is not happy — or even very disappointed — with getting a full refund for a faulty product has failed to grasp some very fundamental economic concepts.