Chen Yan smiled a little, but said nothing.
Strictly speaking, you can't say the teacher is teaching nonsense—when doing scholarship, you naturally need to explain the book thoroughly. And from an academic perspective, the theory of "upholding heavenly principles and eliminating human desires" does indeed have to be tied to the "Zhou Yi" from the start. The teacher starting from the beginning can't be said to be teaching nonsense.
But after all, this is a Zen Meditation Class, not a legitimate place for serious academic studies. Teaching like this is indeed somewhat intentionally padding the content.
The most important thing is...
Of course, you have to pretend to be profound!
Teaching profound content is the way to extend class hours! Otherwise, if the principle is explained clearly in just a few words... how would the teacher earn the class fees?