Because it's simply available as an option. National Geographic is licensed and marketed differently in Korea, so it's just sold as a regular brand in normal retail outlets. It's not really necessary to reach for sociological explanations when it's just random gear you pick up at eMart that happens to have the NG brand. See also brands like Jeep, Ttoma, Discovery Expedition, etc.
Like out of season Christmas and nursery rhymes in Asian elevators, but now with a toxic brand?
