Well, for one, humans are obviously at least more than a fancy Markov chain because we have genetically hard-wired instincts, so we are, in some sense, "hard-coded" if you forgive my programming metaphor. Hard-coded to breed, multiply, care for our young, seek shelter, among many other things.
Markov chains, like any algorithm, are hard-coded. And just as evolution hard-codes our genes, supervised learning (and in the future reinforcement learning) hard-codes LLMs and other AI models.
