Copyright law does not protect abstract ideas or concepts. It protects specific artistic expressions of them. See https://www.copyright.gov/circs/circ01.pdf; there's also a whole body of law around this.

> Artificial scarcity is not something we should allow.

Unfortunately, unless we're all going back to a society in which people can only produce things that are physically scarce, like food, we need artificial scarcity so that people can produce things that are valuable but not physically scarce so that they can buy those things that actually are scarce.