AI has lots of flaws, but that's not inherently one of them, and in the context of ChatGPT it explicitly is not one of them. It samples from a probability distribution, and with appropriate prompts it's actually fantastic at giving you a new recipe every night, or a dozen variations on a recipe theme, and you can tailor it to exactly the level of novelty you're expecting. Randomness by itself is not the human characteristic that the current batch of AI is lacking.