What a lot of people seem to lose sight of is that IP is supposed to be a compromise - somewhere between producers and consumers. It gives producers temporary property rights on something that is not naturally rivalrous or excludable in order to give them an incentive to produce said goods.

These days, that compromise is, in some ways, probably tilted too far towards producers (or some categories of producers at least), but with no intellectual property at all, that would tilt things too far the other way.