While first person has the fortune of preventing people from looking places they wouldn't be able to, it brings other imbalances. For one, the servers without crosshairs in your screen brings a disadvantage to people who don't use a third-party software to put a dot in the middle of their screen. It also brings an advantage to people using several monitors to increase their fov. I suppose you can't have it all though, the difference between full gamma ans brightness at night still outweights these, and there's nothing we can do about it.