Yam allegedly declined to sing in front of members of her last birthday trip. Her legacy would have been jeopardized by such "last poor taste left in their mouths" kind of () irreparable damage to her reputation and brand. Any decent human being like Loong, with a shred of respect left for Yam in their hearts and minds, wouldn't associate such disgraceful 1960s episode with the hard earned legacy of Yam, let alone those that ate off her hand for decades.