In fact, not only Xu Huo, but several people present did not think that this would allow them to pass the level. Xiaoxiao said with a tone that saw through worldly affairs, "Sea World is no different from other sectors; there's no such thing as a real paradise."
Xiaoxiao and her companion were lovers, who came to participate in the show in search of a way to survive. Their relationship could be considered quite devoted, but the show still did not acknowledge their "friendship."
"You Good Me Good" probably wouldn't do a background check in advance, so even though the two knew each other, as long as it wasn't explicitly stated, they were just close friends to each other. Even when making sacrifices for each other, it couldn't be considered a "friendship," unless the production team became aware of their relationship during the show, or the team had a unique set of criteria to judge.
Simply put, it diverged somewhat from generally recognized displays of friendship.