If Player A has a 5.0 WAR and Player B has a 5.3 WAR, I wouldn't necessarily say that either player is better or worse. I would say they are comparable. However, if Player C has a 3.0 WAR, I'd assume that A and B are far superior to C. WAR is just a way to compare players from different teams and different positions for the overall value they provide to a team. Is the calculation the greatest thing in the world? No, but I'm not sure there is one silver bullet stat or metric that is the end all be all. However, stats at least try to mitigate the biases that hurt the value of the "eye test."