We may "just" be neural networks that run on meat instead of silicon, but that does not mean that we're LLMs.

Why doesn’t it?

It's a formal logical error. One does not follow from the other without affirming the consequent.

Because not all neural networks are LLMs.

A GAN is a neural network, does that make it an LLM?

We have inputs other than words, for a start

I’m conscious, maybe you’re not? Not that I really believe that. I think you probably see colors and hear sounds, even in your dreams! But engineering types tend to be persuaded by a particular view of the world, failing to understand that it is a view and not nature itself.