Probably not the current SK government. The current president is liberal side - less pro-American and more pro-peace-talk. (Conservatives would even accuse him of being pro-China, though, to be honest, that's ridiculous.)
However, SK is a free capitalist country, and NK defectors need to eat, so some of them find gainful jobs telling conservative pundits what they want to hear.
Of course there's no doubt that NK is a horrible, horrible place, but still, sometimes you have to take some of these viewpoints with a grain of salt.
I think you are kind of overlooking that the situation is a bit more complicated than just some of the defectors telling conservative pundits what they want to hear. It seems to me from a little digging that detainment of former citizens of the North by the NIS is indeed a coercive process that happens long before the defector even has opportunity to speak to the pundits. How can this be simplified so much?
However, SK is a free capitalist country, and NK defectors need to eat, so some of them find gainful jobs telling conservative pundits what they want to hear.
Of course there's no doubt that NK is a horrible, horrible place, but still, sometimes you have to take some of these viewpoints with a grain of salt.