I'm optimistic it will one day be possible to sift through AI generated garbage, but it will take time just like it did with email/spam. And the most likely outcome will be through paid services, either paid content or paid filtering, just like email works best to this day.
I remember the early email days, early 2000's, pretty much anyone could setup their own email server (qmail/sendmail), there wasn't much spam to worry about and it required a lot of effort to make spam cost effective. Fast-forward today, even though you can still setup one, it requires a crazy amount of effort to ensure delivery in-and-out due to spam abuse, that, or pretty much paying a transactional fee, which is the easiest, so large providers don't flag email as spam.