I'm not sure the Chestnut Tree song was machine generated. [edit: I also recall Winston thinking that the proles songs were sappy and repetitive]. I took that as an older song predating the machine slop. But maybe you're right, and if so it's a sadder and deeper irony.

Finding meaning in slop is not ennobling of the human spirit, and I see no reason to champion it.

Also if the meaning is that I sold you and you sold me; what is the upside here?