Who said so? It might not happen at all. We might well be coding in a thousand years, why not? Non-programmers seem to not understand that a programming language is just that, a language. We use it just because it is more productive than using plain English, which now with LLMs is becoming a better tool to program. But prompt engineering is still programming and that won't change in a thousand years.
The idea that programmers won't want to code, or that artists won't want to art, or that musicians won't want to music, is absurd. Creativity is one of the most rewarding things a human being can engage in, just because corporations would prefer to pay for shitty, broken hallucinated code or art doesn't mean humans will stop doing it for their own satisfaction.
This concept obviously flies well over the heads of the LLM/AI/AGI bros who think that our creative lives is going to be rendered obsolete by vegetable silicon. They lack creativity and imagination.