Yes. I have found that the more open I remain & the more research I do, the more obvious it becomes that there were many that were instrumental in the development & spread of TKD. I appricate that link & have read it before.
It is just that he did not go to NK till 1979. Then in 1980 he brought the team there. That was the final straw for many of his loyal instructors. I do think that history will eventually sort everything out. It usually does. However, time is needed.
I also wouldn't characterize it as a defection to the north.