@jamesthomson My personal theory about why this is has to do with the emphasis on output with development. Writing and art takes time. Doing it right and getting all the details really matters. GenAI can't replace that for the sole reason that each person's artstyle is different and unique.
Development on the other hand focuses on fast production. Code changes, bug fixes, new features. These all can happen much quicker. Add onto that the need to be "first" and you get the current scene.