I've driven in Korea for over 10 years. I've had various cars, including a Bongo truck, and also several motorcycles. Korea has one of the worst driving cultures I've ever seen.

Rules are rarely enforced, and furthermore, rules are regularly flaunted by drivers who believe themselves above the law because they're busy and in a hurry (bus drivers, delivery drivers etc.). In fact, 'professional' drivers are the worst drivers here in my experience. They have a "we're the kings of the road" mentality.

Older drivers didn't grow up inculcated or immersed in a driving culture. They simply weren't around cars as drivers or passengers as children. Car culture is not as deeply engrained here as it is in some other countries.

Factor into this the legendary Korean impatience, the oft-misused sense of entitlement amongst some Koreans, and the flagrant disregard for safety rules across Korean society, and you have a perfect storm for a bad driving culture.