The main problem seem to be the inclusion of the artist name in the metadata of the training images. This makes the style of individual, currently active artist

The main problem seem to be the inclusion of the artist name in the metadata of the training images. This makes the style of individual, currently active artists exploitable in ways that affect the artists negatively. One solution could be to allow the use of the images, but disallow the use of the artist name in the training set. From a privacy standpoint it seems reasonable to disagree to having your name and artistic characteristics connected and encoded into an AI model, even if it's legal to use the art itself as training data.