If the choice is no DRM or literally not making any money on the Internet, content creators will choose no DRM every time. Technologists have all the leverage here. If the web simply didn't support DRM, do you think Netflix, Hulu, and NBCUniversal would pack their bags and lose on billions of dollars because of some theoretical increases in piracy? Of course not. They'd just offer their content with no DRM.
There are many file sharing, illicit streaming and torrent websites that have the entire HBO catalog available. They are pretty easy to find with simple Google searches. Piracy is not esoteric, it's pervasive even today. There is absolutely no technical obstacle to watching any HBO or major studio's content online for free. And that's arguably a lot easier then figuring out how to copy a huge file for non-technical users. DRM can't have any major effect here, people who want to pirate will pirate, DRM be damned.
The only thing DRM does is introduce barriers to legitimate interoperability and innovation. You get situations like "does this operating system or device support Netflix?" which is unheard if the web was truly an open system.