I hesitate to contradict a master, but I don't see how that makes any sense. AI changes can be very local, depending on the change required. I haven't seen AI making unnecessarily broad changes when a narrowly scoped change would suffice. And even if it did, your SCM would easily show you where the changes are. There's no way you wouldn't know where it's changed. Maybe in his domain things are very different. Or maybe the video was cut and edited in an deceiving way.