The point of the DRM schemes is basically to keep video "hard enough to copy that normies don't do it". And not even "normies can't find it on the Pirate Bay" but "you can right click and download from Netflix."
If they mostly succeed at that, they consider it good enough.
Well, it sure seems to make a market for people who would/does pay for legitimate 4k video in their browser to pirate. I am happy to pay for streaming, but as the quality goes down so does any desire to shell out honest money.
If they mostly succeed at that, they consider it good enough.