I'm not sure what my personal concerns are specifically, so I don't have a good answer to that question.

But I think there's a difference between a crud photoshop picture that a person has on their PC, and a (more or less) convincing deepfake video of a person being broadcast.

I think you're likely right that there is an element of panic. I don't know a lot about Korean culture, but I imagine the concern is that deepfakes can have real-life negative impact on people's lives, either because people think it's real or because it creates a hyper-sexualised social environment that endangers women. Both are worthy of concern in my view.