It’s an acquired taste, but once you’re hooked you’ll always have plenty of personal space. I had a Korean classmate whose wife came over to join him, and cook for him, after the first semester. We could smell the garlic vapors coming off him in the classroom as he came down the hall the first day of second semester.
Now imagine being on a transit bus with 50 people plus the driver and ticket girl who all just had kimchi for breakfast.
Not all kimchi has garlic in it.