The real reason we have DRM-free stores is because there’s no copy protection on CDs themselves. Companies tried and failed several times to add copy protection to CDs. That, on top of a great public outcry, is the reason we have those online stores. For some reason the public didn’t fight as hard with video and rights are a lot harder to manage with so many contributors.

You’re right that Musicians can publish their products on their own because the funding requirements are much lower. Movie/TV costs have skyrocketed and very few can afford to publish their own products. Just look at Coppola with Megalopolis. He self funded like $200 million for the movie but still had to get a distributor.