You actually can construct reasonings in which bone cancer in children might serve some greater good, though such reasonings are very painful to hear for people

You actually can construct reasonings in which bone cancer in children might serve some greater good, though such reasonings are very painful to hear for people remotely affected, so I won't try that. I know that I'm stepping on thin ice here, but: My son does not want his teeth brushed. He absolutely hates it, because he does not yet understand that this pain is way lesser than the pain and treatment of tooth decay. So, I still have to do this to him, at least twice every day, because it is necessary. I DONT mean to say that bone cancer might be good for something eventually, but; if it were, then we might not understand it, because we don't have neither control nor insight over the future.