This is one of the first parts LLMs tried to automate. They were literally released in a form of chatbot. Whether it succeeded is another question.
> Did the world really wake up one day and concluded that, "wait, we're spending too much on musicians"?
I'm not sure about musicians specifically, but in the whole past decade studios have been complaining how costly it is to make AAA games. And the cost mostly came from art asset side.