Definitely not just “written by” but heavily used I’m sure. It’s widly known that Rockstar’s GTA Trilogy they relied on AI just to upscale everything for them and then just shoved it out.
Maybe someday we’ll get to the point where AI is good enough to produce whole works without human need, but we’re a ways off from that right now. Right now it’s a great tool to help augment jobs, but should be fine tuned and combined by humans. Buuut studio execs breeze past those details and just start the layoffs.