I can buy the CD From the Cradle for pennies, but it would cost me hundreds of dollars to see Eric Clapton live

This is correct. An LLM is a tool. Having a better guitar doesn’t make you sound good if you don’t know how to play. If you were a low skill software systems etc arch before LLM you’re gonna be a bad one after as well. Someone at some point is deciding what the agent should be doing. LLMs compete more with entry level / juniors.