Rocks have random structure, not complex structure. Randomness does not entail consciousness. A feature of consciousness is that it is informative: it informs y

Rocks have random structure, not complex structure. Randomness does not entail consciousness. A feature of consciousness is that it is informative: it informs you about the external state of the world or about internal processes. But a random configuration of molecules carry no information. (A random string is information but it doesn't carry information, i.e. mutual information with another structure.)