I think both are fine. One source of the difference in reception (aside from the selfish aspect) is that the space of work generated by Copilot has fewer degree

I think both are fine. One source of the difference in reception (aside from the selfish aspect) is that the space of work generated by Copilot has fewer degrees of freedom than visual art. So the things it produces are much more likely to be near-identical to existing code than Stable Diffusion is to images. I.e. if SD were just providing near identical copies of artists' work, people would be more sympathetic.