Most of these articles seem to forget that the ROK (”South Korean”) military is very large, capable and well-trained. It isn’t 1950 where a large Soviet equipped army is going to slice through a token force like a knife through butter. Ask the NVA and Viet Cong their opinion of the South Koreans.
Which is why we should get US troops out of South Korea. SK is perfectly capable of defending itself, and our troops are merely an attractive target for the north. They would be sitting ducks and their presence serves no purpose.