>"This is an excellent example of positive use of IP law, and why removing copyright and patent would harm"

And there are countless counter-examples when IP law causes harm to consumers and inventors.

>"legitimate business models"

And what makes them legitimate? IP law is an artificial construct which currently serves select few. Why should not I be able to "invent" something and sell it without the worries just because somebody else happened to have the same idea? And many of the existing patents, especially ones in a software field can be "invented" by any reasonably intelligent Joe Doe in a few minutes if there is a need.