This article focuses on the sheer "access" aspect, because that's the most noble. If you can't legally buy a work, you aren't going to pay for it. If ever the word "entitlement" should be used in these debates, I'd say it's here. For people who aren't able to legally access these culturally significant works, I'd say yes they are entitled to be able to access these in an illegal manner and experience our culture. Note culturally significant. I'm not talking about the artistic merit of Hollywood blockbusters and the top 40 here.
Similar to the "access" argument, there's the "exposure" argument. How many works have been pirated simply because they were free, but not something you'd be willing to risk ~$10+ on? Piracy enables people to get a taste of genres and styles they never would otherwise experience. I grew up in the age of Napster, and I was in middle school going to high school when Limewire was getting big. I listened to a much wider range of music and watched movies I never would have otherwise because they took almost 0 effort to acquire. I am a rather different person than I would have been without piracy. I look at my music library and my taste in movies, and realize almost all of that is because I was able to pirate them. I think the fact that older people tend to be more hostile to piracy isn't only because of ingrained habits, but partly because they weren't shaped by its effects.