Of course for humans words have no inherent meaning either, they're just sequences of characters or patterns of sounds. It is what words are associated with that carries meaning. A large part of this is how words relate to other words. LLMs can capture this in principle. What LLMs lack is the direct association of a word with sensory experience. But it's an open question how relevant this is in practice to understanding.

The same thing can be noticed in dreams. I once heard advice to try to re-read what you see in a dream. So I was dreaming and in a dream I read a phrase about something and there was a name of a city there. I managed to remember that advice and re-read the phrase. It felt exactly same, but the city name was different.

(LLMs carry other numerous similarities to dreams or to certain psychiatric disorders. So there is indeed a mechanism in our brains that is similar to how they work. But it is not the only thing there and on its own it won't "evolve" into consciousness. Even if we believe consciousness evolved somehow, it would be hard to imagine it started as a delirious state and then somehow ceased to be delirious.)