This argument depends on the idea that someone’s creative work output being used for AI training somehow deprives them of benefit from that creative work output - the basic idea behind “copyright infringement is stealing”. This is not to agree that AI training is copyright infringement, just that it depends on the same concept of intellectual property.

I don’t subscribe to this basic idea. Copyrights are a legal fiction designed to prop up an industry. Somehow from that we went to the idea that creative work output is property. It isn’t. It’s a service. This is why “works made for hire” is a thing.

This is the same reason that reasonable people don’t believe that fanfic authors should be jailed.