I'm not an expert on the details. I would just simply reiterate that Korea has a history of a very active industrial policy, and even after the 1997 Asian financial crisis, they adopted a very deliberate export-led growth strategy and very successfully pulled themselves up by the bootstraps.
But that policy was based on, and very successful in, promoting exports and limiting imports through a whole range of non-tariff and informal measures and close connections between business and government elites and perhaps even a sense of national and societal solidarity, a preference to support local industry.