Why does North Korea prohibit going abroad?

Theoretically, it is ok for Koreans to go abroad, but not for tourism. Koreans go abroad through extremely strict inspections, demanding political clearance, and their own political ideas are correct and their values are innocent.

Generally speaking, North Koreans go abroad only by senior government and military officials and their relatives, so it is difficult for civilians to have the opportunity to go abroad. Most North Koreans study abroad, go on business trips, go on business trips and so on, which require hard work and consciously resist the decadent ideas of capitalism.