When a model is trained on 'all-rights-reserved' content like most image datasets, the community say it's fair game. But when it's 'just-a-few-rights-reserved'

When a model is trained on 'all-rights-reserved' content like most image datasets, the community say it's fair game. But when it's 'just-a-few-rights-reserved' content like GPL code, apparently the community says that crosses a line? A) This is just taking divided opinion and treating it like a person with a contradictory opinion (as others have noted). B) Nothing about GPL makes it "less copyrighted". Acting like a commercial copyright is "stronger" because it doesn't immediately grant certain uses is false and needs to be challenged whenever the claim is made. C) If anything, I suspect image generation is going to be practically more problematic for users - you'll be exhibiting a result that might be very similar to the copyrighted training, might contain a watermark, etc. If you paste a big piece of GPL'd copy into your commercial source code, it won't necessarily be obvious once the thing is compiled (though there are whistleblowers and etc, don't do it).