What made you have the hallucination that "Xiaohongshu users are all illiterate"? Have you personally used it? Why do you compare WeChat and Xiaohongshu? They are completely different products, targeting different user groups. If you think WeChat has only developed to its current state through mobile payments alone, then you are completely mistaken.
I suggest that you abandon your belief in WeChat and instead listen to the thoughts of young people in China. Young individuals tend to dislike clichés and platitudes.