I get what you mean but I don't really think they are comparable, since one of them is art and the other is typically product development. Art factors in the person behind the art piece, software (or other products) does not. The value of art is tied to the skill, creativity and experience required to make it as good as it is (at least in most people's mind).

But also, the main claim of the advantages of code generation is that it will make software development cheaper, and will end up making software cheaper. This is currently not necessarily the case because the quality of the code generation is not really there to make actual (reliable) product development cheaper, but it helps a lot with rapid prototyping. Or as I see it, more things are being prototyped and never finished. What also factors into this is that there are not many incentives for big tech companies to lower their prices, because a lot of what they're offering are tools that we need. This is also not the case with generated music.