Well, let's take the more tangible case of books. Authors use a year of their life to write a novel which provides entertainment and afterthought to his readers. BUT instead of selling 1 million copies of the book with copyright protection, the book only sells 100 copies because there is no copyright protection. The market is flooded with cheap or free pirate copies of the book. Millions of people read his books and since various materialist libertarians have been very successful at spreading their morality that intellectual work has ZERO value. Hoards of people not only do not pay for his book, but actually scoffs at people who pay for it for being "irrational" and "wasting money on something that has no value." So these people who read his one year work not only do not pay, but have a really, really good conscience about not paying, thinking "he got paid exactly what he deserved: ZERO. That's free market capitalism for you" before he continues reading the exciting book which allegedly was of zero value.

So what you anti-IP libertarians are doing is something much, much, much, much worse than actually just reading a book without paying for it. You're spreading ideas to people that they should do it with a clear conscience! Then when all of society is like that you start wondering why there are no more new really good books being written, and why all the Hollywood films that come out are crap and regurgitations. But at least it's free!