I don't really see how this is different from "LLMs can't multiply 20 digit numbers"--which btw, most humans can't either. I tried it once (using pen and paper) and consistently made errors somewhere.
This argument is tired as it keeps getting repeated for any flaws seen in LLMs. And the other tired argument is: wait ! this is a sigmoid curve, and we have not seen the inflection point yet. If someone have me a penny for every comment saying these, I'd be rich by now.
Humans invented machines because they could not do certain things. All the way from simple machines in physics (Archimedes lever) to the modern computer.
If your disappointment is that the LLM didn't invent a computer to solve the problem, maybe you need to give it access to physical tools, robots, labs etc.