The marketing for "AI" uses phrases like "the sum of all human knowledge" to refer to what has been used to create "models". The assumed irrelevance of non-published, "private" works is dubious if not absurd
The internet now allows potentially anyone to publish anything, e.g., via personal websites, social media pages, etc. But that doesnt mean everyone partakes. How much of the unfiltered garbage published by those who do has been used to create these "models"
"AI" companies will not reveal exactly what "works" were used to create the "models"