he meant that that's not the primary concern. the sourcing of the data is a red herring, they care about losing their ability to make a living doing the thing that they love that is so central to their identity

I think I'm not sure how to parse your statement... I don't think there'd be much care for (or need for) the UX change if it wasn't for the whole ideological/valid fear about training AI on creative works? But it has been a long day, so I apologize.