[OmniBus]

You are misleading. Koreans have their own languages. Only the written form is drastically changed. It is not a new language.

It is more than hard and easy. Remember there is politics and culture. The disuse of Chinese character is pretty recent, post-WWII.

Recently, some Koreans suggest to pick up Chinese character in Korean. In the past, Korean culture and history are written in these characters. After a few generation, only very few people can recognise them properly. Also, Characters differentiate homonym. With characters, it would cause much confusion with numerous homonyms.