Can you expand on what further randomness is supposedly injected? Every single AI system which I have used has supported seeding, and seeding made very single one deterministic. I honestly don't know how you're supposed to have "randomness" in AI models if the RNG is seeded.

It's a different story if you use specific libraries like Xformers, but those introduce randomness as an artifact of their optimizations, not due to any magical non-seeded randomness.