I disagree about difficulty. There are rules about how to make the strokes and with a little wrist, finger, hand and eye training, I found it fairly easy. If you have someone teaching you, not a video, but live, you can accomplish the different strokes easily. It's simply ink lines with the brush actually making the different lines based on brush position, rotation, and variation in brush pressure, you call dynamism.(good description) I think composition is especially important in ink painting and pleasing artistically.
I took several classes in Chinese brush painting and after learning how to do blossoms, limbs and bamboo, the challenge went away. The rules kind of took away creative freedom and didn't leave much room to go.