I know two people who are both intelligent and knowledgable. When they travel and visit others they need directions like most of us. One of them likes to be told "Head north along such and such until you get to this and that and then turn west for 3.2 km..." the other likes to be told "When you get on such and such turn Right and drive till you get to this and that, where Freds' gas station is, and then take a left turn follow this road till you see a ..." They're both intelligent and capable of driving anywhere but they get confused if they have to follow the other's directions. Its a waste of time complaining about the way they each think,because they each think that what they do is so simple, its faster to give them comprehensive directions and they can use what they need. Music theory works the same way. Different bits are easier for some than for others. Need ANY of us cast aspersions on somebody else's attempt at explaining or understanding?