And once you've pried the data out of the drive's hands you still have to decrypt it.
https://forum.makemkv.com/forum/viewtopic.php?f=19&p=96988 https://forum.makemkv.com/forum/viewtopic.php?f=19&t=24312
And, like what SGX is providing, if the film industry really want to stop pirating, they can. Then makemkv will be a history.
I doubt that, if for nothing else the Analog Hole[0]. At some point in the chain, the video data has to be turned into usable information for a display panel and speakers.
They keep adding steps to the chain, moving the final step closer and closer to the end, but it is still possible to bypass. In the ultimate case, you could probe the display board directly and convert the raw panel voltages, but in practice there are many earlier opportunities.