Even if LLMs never reach AGI, they're good enough to where a lot of very useful tooling can be built on top of/around them. I think of it more as the introduction of computing or the internet.

That said, whether or not being a provider of these services is a profitable endeavor is still unknown. There's a lot of subsidizing going on and some of the lower value uses might fall to the wayside as companies eventually need to make money off this stuff.