If Jiang Qi had not delivered a wedding cake to Zhou Shishi that night, she would not have had an accident. She would have lost her health, her most important sense of taste as a chef, and her future.
As a walking dead, she has lost the person who cares about her the most.
Good people should not be rewarded with good things. If the world is unkind and everything is like a stupid dog, then I, Jiang Qi, will do it.