I'm skeptical that "encouraging creators by offering protections" is much more than a rationalization. (And I'm not sure whether it's historically accurate, although that's beside the point.) It doesn't seem like the concept of intellectual property and its protection under the law have been effective at encouraging people to create things; they seem to be more effective at encouraging rent seeking. If we want to enable and encourage people to create things, we should pay them to create – not pay them to share something after they've already created it.
For example, we can pay someone to perform the labor to create something we want (contracts), we can finance their endeavours or subsidize their living expenses if we like their work (the patron model), and so on. In fact, we already do these things, but their effectiveness is limited because our current laws favor other business models.
And there's a wonderful reciprocity: if I pay someone to create something, not only do I get what I want, but everyone else gets to benefit from it too. And the things that other people pay to have created I also get to enjoy (and there are a lot more "other people" than there are "me").
[This is the visualization of a goal (or at least an alternative way of going about things) and an argument for its possibility. Unfortunately I can't claim to know its feasibility, how to get there from here, or even which tactics would be effective, but I hope to have good answers some day.]