Wouldn't the human creators be the biggest advocates of labeling, so that their content can be more easily found among the AI dross? And that's not considering the fate of the platform as a whole if it descends into low-effort AI spam swamping out everything else. I guess it will be interesting if it is all bots consuming bot-generated content in a parallel economy.
The entire discussion was centered around whether or not using AI to detect AI content would work, or if it would create false positives that harm human content creators.
It could work "well enough" for YouTube to consider it a success while still harming a fairly large number of content creators.
