Because as humans we don't know what working together is. And that is why we argue. And that Is why you don't do raids with random people. We see slight differences in each other and that causes us to be judgemental and accuse the other side of being worse and making everything into a competition. I personally am a hunter. And frankly. Warlocks are cool. So are titans. And so are hunters. We all have our strengths and downfalls. But if all three work together. They work with each other.