Sure, LLMs and Stable Diffusion will not be the final forms of AI even though they are really impressive now.
But that they are just maths isn’t the limiting factor. Natural neural networks are just maths too.

The solution for removing the need of human labor is fully automating everything. But something needs to be the ghost in the shell. Surprisingly few tasks don’t need human-level intelligence. We know, neural networks can do it because humans can do it…
We just can’t make good enough artificial neural networks yet.