This is an extremely important point that's worth thinking hard about. After all, to some degree, human intelligence is also "just a fancy autocomplete" built from a giant network of interacting nodes.
The question of, "When do we grant personhood and moral consideration to AIs?" is worth thinking hard about. Turing proposed a standard which would include a sufficiently human-like chatbot. Now that we have more or less crossed that threshold, we seem to conclude that it's not a high enough bar. But that means we're entering the territory where the philosophical zombie thought experiment[1] becomes relevant.
In fact, I wonder what would happen if we dedicated a supercomputer to running one single long-running session of a GPT3.5-sized LMM. Further, I wonder what would happen if we connected it to a robot body where it could control motors, read sensor/camera info, and generally interact with the world. We could then give this system a clock which ticks at regular intervals, where the AI system is simply prompted to perform some series of actions if it "wants". This is all stuff we have the technology to do today. How would such an experiment turn out? How human-like would this LMM with a body and life experience turn out? Does it matter? Should we just assume that sentience or qualia is binary; that humans possess it but LMMs categorically do not?
I think the question is worth taking seriously. I think it's worth taking seriously because my own moral compass does not know which direction to point in at all.