Why do most martial arts fail ?  

wingchun viral , mma ,karate, fitness, kickboxing, bjj, boxing,
muaythai ,jiujitsu ,training ,selfdefense ,kungfu ,taekwondo
ufc,fight,motivation,fighter,judo,grappling,sport,
brazilianjiujitsu ,workout,gym,wrestling,
martialartist,mixedmartialarts,blackbelt, wingchun ,wushu,brucelee