They seem to think that this music has nothing to do with rock, and that rock music has nothing to do it. So, for example, a C major chord is made up of the notes C,E,G. Notice that the distance between the C and E is a major third, and the distance between the E and the G is a minor third. Bravo, you catch on quick. The I chord. This is where everything comes back home.
Humans crave resolution.
In every part of your life, you are trying to move yourself into a mode of resolution. You've completed the cycle, and you'll do it for the rest of your life. This is what music does. The conflict in the predominant begs to be moved onto the dominant, which can then be resolved back to what it originally was. It's what drives you and the music on.