Wang Zhong's theories on control were high-end and could only be comprehended and applied by those who had complete mastery over their soul power. For most people, they were at the level in which increasing their soul power output was the only way to improve. To incorporate the element of control into their soul power was a little too advanced for them to achieve.
Sharmie had some comprehension of it, but it wasn't enough for her to do anything with it. Wang Zhong had simply pointed out a path for her to follow. If Wang Zhong had not informed her of such a path, she would still be pondering on which step to take to advance in her training. Overall, however, her soul power's special traits made her suited for control. With her current level, simply increasing her output by a few dozen grassos would produce negligible outcomes. Yet, if she could achieve the desired effects as stated by Wang Zhong, then her might could be compared with one in the heroic soul stage.