Although it is strange.. There must be a standardized gamma setting now or something. I spent a lot of time setting up my t.v. when I first got my ps4 and I've yet to need to adjust the brightness or gamma on any game.
I still do not get why they would leave this off. It makes no bloody sense.
I have seen this option being omitted from more and more games recently. Considering that people have different brands of TV and differently set up. Not to mention that people have different preferences I just don't get why they would leave this out. I guess because individual movies don't need it they think that their game doesn't either. I have to admit though I haven't felt the need to change it but would like the option nevertheless.