I have been studying Korean for a while and been looking into Korean language music. Of course every country seems to mostly have some light pop on their top lists, but I don’t feel like I have had problem finding diverse genres and bands from other countries. But when I have been searching for Korean bands and especially artists singing in Korean language the exceptions to k-pop and “soft” music seem far and wide between.
And it’s not like there isn’t any skill or interest, I can find even gayageum covers of rock songs showing how awesome that is, but that isn’t being utilised for original modern songs like it is in the neighbouring countries.
I guess it’s because this music sells all over the world and other doesn’t because there haven’t been big artists who play other types in Korea. And kpop is produced in the lab and they cracked the formula to be able to re-record the same song over and over again with different people dancing to it.