It just depends to how you like your car to be I suppose. For me, I never used more than a ride height gauge and a camber gauge. And in fact I never really touch the camber settings - if they are similar between left and right and between -1 and -3 degrees than it's within the 'normal' range. It's not what I'm looking for when I change a setup - I'm not that refined that one degree more (or less) of camber will make me drive quicker.
However, if you feel more comfortable knowing that your car is set up very accurately, I guess it could at least stimulate your confidence in the car - If you ask me, that could help for a more consistent and quicker driving style. And perhaps you're more refined than me in feeling those small setup changes...
