Well, miracles do happen sometimes!
I've also wondered that. HK's house wasn't just vandalized; it was set fire to and partially burned down.
I've always assumed that it was something about HK's personality—some kind of almost perverse stubbornness, a refusal to cave in to institutional bullying and abuse of power. Somehow, it strikes me as a very Korean thing—who else in Asia stood up to the Mongols and beat them? Or offered such ongoing, continuous armed opposition to the Japanese, thrashing them soundly in at least one spectacular naval battle? He has always seemed to me to embody what I've thought of a cultural value amongst Koreans—resistance to the imposition of authority by force—that lies under the surface of deference and politeness. Probably other things were involved as well; but that's where I've always thought the driving energy for his behavior must have come from, giving some thrust to the edge of his belief that this was not a good thing for Korean martial arts. He may have thought that a homogenized KMA was the wrong way to go, prefering instead a kind of do-your-own-thing approach similar to what he may have learned about Chinese systems, where, relatively speaking, wonderful anarchy reigned...