The demanding work life the article references is real. South Korea is #2 in the OECD in average annual hours worked, at 2,070 hours per worker for 2016 (the US was #14 at 1,789 hours by comparison, with the OECD average at 1,763). That's 41.4 hours per week across 50 weeks, basically the average South Korean is working overtime every week (by US standards).