I didn't know that there was a term for it, but it's a principle that does apply often. The whole point of prog is to push boundaries, do things outside the norm, but at the same time, there has to be enough familiar elements for our brains to latch onto. The ratio is different for everyone, and will vary from piece to piece as well.
The first several times I listened to "Close to the Edge" by Yes, that intro was just cacaphony. It was so "out there" that I couldn't grasp it. Eventually I realized that it was in fact just in 4/4, and I could hear patterns in it, tonalities, then finally actual melodies became apparent. Now, it's just a bit of music played by four guys. Four amazing guys, but I can get my brain around it.
Prog is often like that. At first, maybe too weird to register as "good". Your brain is still trying to making heads or tails of it. Then at some point you "get" it. That doesn't automatically make it good, but at least you feel like you're in a position to make that judgement. There's still a lot of music that I don't like, but I have to admit that I just don't get it, or maybe it's just not for me so I can't say whether it's good or bad. I just don't like it (yet?)