It wasn't that he thought he couldn't earn Favor Points by instructing the Outer Courtyard students, nor was he worried his guidance would be subpar and negatively affect them. The simple fact was, teaching students was Guo Wei's job. He hadn't yet finished his apprenticeship and couldn't overstep his bounds without Guo Wei's permission.
On the path of cultivation, one must not only stay true to oneself but also, more importantly, fulfill one's duties.
Chu Lingguang didn't dare to overstep his bounds, nor had he ever asked Guo Wei if he could instruct the Outer Courtyard students. He had dared to guide Liu Quan only because he was the one who had brought Liu Quan to the Martial Arts Hall, and they were both from Liu Family Gully. Even if Guo Wei found out, he would likely see it as two boys from the same village helping each other and not think much of it.
