Thanos was an example of someone who is the hero of his own story, ya dingus, as OPPOSED to the psychopath who has no concern for heroic action. It is a contrasting sentence, "for every *insert villain who IS the hero of their own story* there is an *insert villain who is not the hero of their own story.*" Can't even post a simple commentary on the degeneration of villains in modern media without someone going ham like you're attacking the very core of their being. I agree that many villians are heroes of their own story, but I see that saying too often, and I enjoy a good villain who doesn't think of themselves as heroic in any way.