There is more to selling software than writing it. You have market, support, and sell. Do you think their resources are well spent doing that across the gamut of software? Of course not; companies specialize.

Very similar to how cloud providers love renting servers to you to run your bank or software business; instead of running these businesses themselves.

Isn't the promise that LLM can do all this better than any human? Or at least in few short months? Surely marketing, support and selling is just case of right prompt?