Let's say a content provider created the perfect media service, exactly to your specifications - super easy, DRM free, etc. etc. Done and done; the service issue is gone.
Tomorrow, you want a new movie. On one hand, you have Provider X's new service, and on the other, you have piracy, which gives you pretty much the same content it always has but now is relatively less convenient in comparison to the service. Which are you going to choose? Oh yeah, by the way, piracy is still free, but Provider X is charging $19.99 for a movie, because that content service cost them millions. More importantly, they don't want to devalue their content. They don't want to live in a world where the street value of a first-run film is 99 cents.
Piracy is a value issue. The only reason it looks like a service issue is because there's a reasonable solution to that part of the problem and it's easy to point at content providers and blame them for not fixing it. But the reason they don't is because if they did, it would simply surface the other side of the problem, which they're not going to do anything about.