Unless he could guarantee that no one would find out that he was GAY for the next four years and that no one would get a hold of him, he would be on pins and needles once he sat in that position. He would also implicate the people he loved.
Their country had never been tolerant of gays. Public opinion could crush people to death and cause them to die of depression.
He once knew a male friend who had a successful career but was GAY. He came out of the closet in public and couldn't bear the pressure of family and society. In a few years, he suffered from serious depression and finally committed suicide at home.
This was also one of the reasons why he didn't want to kill Yan Qing. He didn't want to ruin the rest of a person's life because of a power struggle.
In fact, if society's tolerance was higher, he felt that their country could be more tolerant of this group of people.