I don't think every meat eater is a blocked vegetarian. But I think I was, for a long time.
Adams doesn't insist on the literal truth, either. It is a way to mentally/emotionally handle the confrontations and conflicts that often result when meat-eaters and veg*ns interact. For instance, say your omni brother keeps teasing you by waving forkfuls of meat in your face. Instead of regarding him as just an @sshole, you see him as someone who is threatened by your choice. Why is he threatened? As you explore the possibilities, you might have more compassion toward him, which in turn affects your interactions positively rather than negatively.
I'm probably explaining it awkwardly. But that is one example.