Did you read the website at all? It discusses that taking a screenshot or adding any other amount of blur, noise, etc isn't a way to circumvent this method.
There have even been other drm systems that have fairly succesful at attacking analog hole, e.g. https://en.wikipedia.org/wiki/Cinavia
Of course, no solution prevents everything,but preventing a specific system from using the data in a way that is hard to get around is highly possible.
If the ingestion workflow alters the picture sufficiently, the protection could be lost, same as DRM qualities are lost if someone alters the data-stream by recording what is shown on the screen of the display device.
[It should be noted that the comment 3 up the chain i was replying to got edited so my response 2 up the chain makes less sense now]