Personally I think AI training is free use. I also think AI is a fad and generally used as a way to scam people.

However, artists complain about AI because it pulls from their business (in theory.) Artists generally don’t complain about piracy by the end user because the artist is usually still credited in someway (signature watermark etc.) and piracy doesn’t generally stop other people from paying for their art. AI in theory steals their jobs.

The main people who complain about traditional piracy are the executives of companies that purchased copyright on artist’s works through contracts that do not favor the artists.