Nope. You missed the point. I said the opposite. If your training data have any absolutely innocent children pictures at all and also NSFW content with adults

Nope. You missed the point. I said the opposite. If your training data have any absolutely innocent children pictures at all and also NSFW content with adults then model will be able to generate NSFW content with children. It's that simple. Also even if you remove any children completely from training model will still be able to generate CSAM-like content because a lot of legit porn include jailbait models.