Capitalism increases production by creating artificial scarcity, which forces most everyone to work desperately hard to compete for what has been made scarce.

Thus, eliminating the artificial scarcities can enable people to live comfortably while producing less — and thus reduce the strain on Earth's natural systems that we are now overloading.

Artificial scarcity of material things reduces the supply, but even without artificial scarcity those things are not totally abundant.

Forbidding the sharing of copyable works is the ultimate instance of artificial scarcity, since it makes something scarce which would otherwise be available without practical limit.