This is a decent point. I mean, Tarsus is TOS canon, but the show totally dropped the angst-ball on that one. I mean, if you made the Tarsus storyline now, we'd have to have flashbacks to the first time he killed a man at age eleven, or something, but in TOS it's basically like, “Yeah, so I never mentioned I am one of like five survivors of a genocidal maniac, did I? Long story, moving on!”