Ask HN: Why isn't AI image generation closely linked with graphics code gen?

For example, when making an iOS game, you might want to ask the AI look at a screenshot of your game and to generate images with improved graphics.

You could then pick one of the AI images that you like and then ask the AI to write Swift code to generate scalable graphics like that for your iOS game.

Why is AI image and code generation not currently optimized for this use case?