When Lu Yin saw Dacheng climb up the stairs, she was stunned. She immediately pulled him back and asked him, "What do you think you are doing? Just stay here and take a break."
How was Dacheng supposed to tell Lu Yin that he didn't want to stay with her and the rest of the non-ability users? It made him feel like less of a person and he didn't want to feel this kind of feeling ever again. When he was living in the village, he could only watch others leave and find all kinds of respectable jobs.
While he was asked to stay behind by his family.
As he was the youngest, his parents wanted him to live with them and take care of them in their old age. Thus, Dacheng had no other option but to grit his teeth and agree. Even when he wanted to go to the town like his big brothers, he wasn't allowed to do it.