Because the elementary textbooks and lessons are so rigidly structured, there isn’t spare time to teach cultural sensitivity or differences.
I think this is a loss, because frankly, there probably isn’t going to be any practical or reasonable time for my students to EVER use English. I say that because I don’t think learning English to speak it during an interview with other Korean people is reasonable. Actually, it just seems pretty stupid to me. Also, it is pretty likely all they ever learned was Konglish. Yes, my students are only learning English for their future job interviews at big Korean companies.