Over my dead body will they get into sumo. I want them to swim or play tennis. Anything with an international flavor will be good. In fact, there are plenty of reasons to steer one's children away from sumo. Early death in the professional circuit is tolerated as either inevitable or normal.
Death is the end of life, but it is also the end of sumo.
A lot of my training was learning about how to kill, learning about where the human weak points are. Sumo is a mixture of boxing and judo.