I always explain this “nudification” process as…

You know how if you put black bars over someone in a bikini or speedos, and suddenly they look naked? You haven’t seen the person naked, but you’ve got a good idea what they look like naked because your brain filled in the gap. It’s exactly what the diffusion model is doing.

I’m not sure it’s realistic to stop the models doing it entirely given how they work. If you want it to fill in the background when you cut your ex out of a photo, it’s going to fill in any other gaps.