@erikbrown157 I missed the historical baggage to first get the comparison. But then I went to read https://en.wikipedia.org/wiki/Enclosure , and it was more clear after that. TIL.
Maybe the comparison is wrong, because in the case of art and pictures; they always have been under Copyright to start with (and not common goods), and the A.I dataset are not really changing the license. Maybe they even pretends to do the reverse: laundering © style into Public Domain (of course, NO) , eg: https://lexica.art/?q=moebius