You must have forgotten watching Kiko getting blown up on run plays up the middle. IMO he's the exact comparison to Brandon Spikes but for the exact opposite skill sets.
I remember Trent Dilfer saying the reason RGIII can't survive with his style play is he's "small jointed" and that he just doesn't have the body mass to withstand getting hit. I see Kiko in the same light. His body cannot withstand the reckless abandon he's willing to put his body through.