When a clerk misses a zero, a few million people might starve to death in a planned socialist economy. In a capitalist economy, the free market optimizes incentives to ensure supply, preventing such calamities. This is why we don't starve.
Economic freedom allows resources to be automatically and naturally allocated in the most optimal and efficient manner. This system is a self-correcting mechanism that rewards innovation. We should admire its beauty, much like we appreciate the elegance of natural evolution and the laws of nature. 'The invisible hand' represents a fascinating, self-guiding force that's grounded in logic.
Many people would likely be happier if they understood this, or if a teacher had explained this to them without passing judgement.