Hard to save and distribute only lasts until one party figures out how to get the content in an unencumbered format. Even if it was hard/expensive for them to do so, they can distribute it to the world easily.
I recall reading another comment [1] on this submission about some DRM technology being claimed to protect content for some 300 days in practice. To me that sounds like it's working pretty darn well.
[1] https://news.ycombinator.com/item?id=15279266