> Writing is art and art requires a human soul for lack of a better word.

I think it's the other way around. The human soul requires the art. Or rather it craves the process of creating art, more than art-the-trade-item. When image generation was new, someone raged: "They want to build a genie to grant them wishes, and their wish is that nobody ever has to make art again."

> As for proving that you wrote it...yeah that could be tricky.

On social media, when people share their drawings they often share a photo with their tools visible (pencil, eraser) instead of a clean scan. It sends a message like "Look! I made this!". Or they post a time-lapse. Or details about their process, like here: https://www.viruscomix.com/makingofpartfive.html

The point of this is not mainly to "proof" anything, I think, but more a community signal that they care about their craft and are curious how others work. You can probably generate a convincing fake process with AI now, but... I wonder if anyone is willing to go that far.