I'm not sure that connotation is all that present in the way it's commonly used, but I'll grant it. However, like the other person you responded to has said, "slop" already had that meaning, because it is the low-grade cattle feed. So If both "AI slop" and "goyslop" carry these shades of meaning, it would not suggest one descends from the other, but that both descend directly from "slop".
That's maybe true, but "goyslop" was specifically referring to vapes, processed food and tiktok. Then shortly after people started calling tiktok "slop" and ai tiktok "ai slop".
I think its a stretch to declare there is zero relation considering how much internet language originates from 4chan.