I don't think it's quite that simple. A great deal of work has nothing to do with computers, and even more human activity has nothing to do with economic advantage. The scope of your statement is a bit too broad in that regard but for computer based work I think you are a) more or less right but b) if you are right it's not clear how much economic benefit LLMs will actually provide on balance, long term.

Does it make the world a better place, and more prosperous? Does it just move economic activity around a bit in regards to who is doing what? We'll find out in ten years when the retrospective economic studies are done.