[You are all my little apples, hahaha!]
A person's life should not be too selfish. There's a certain regularity to what needs to be done and when, and the older a person gets, the stronger their abilities become. Stronger abilities mean more responsibilities and duties, just like Ye Tianchen now. He thinks it's time for him to get married. At this stage, he feels he should get married, even if it's just for his parents. Ye Tianchen will do it.
For ordinary mortals, when it's time to get married, they should marry. Especially considering Ye Tianchen's parents, their lives are nearing the end, with only a few decades left at most. These decades are neither long nor short, and life's unpredictable. At such a time, the biggest wish of parents is to see you marry and have children, to have a stable family. That alone would be enough, adding a stroke of beautiful color to their lives, and to yours!
