It isn't, but you're trying to compare apples with wolverines. You need to have a good technical expertise first, and we all know how hard that can be to attain within the Bujinkan. Not if you take into account the factor that he reportedly became a priest "to pray for the souls of the men he killed". He had all the technical skill possible already when he engaged in those matches. Most in the Bujinkan who would spar do not. Get my point? I think randori is fun as hell. You just have to know how to use it in a good manner.