"Set the Toe and let it Go" mentality or "It's within specs, what the problem?"
The side to side relationship between between camber and caster can cause unwanted pulling/wear problems. If you have a specification range of 1 degree for both caster and camber, a vehicle could possibly be set with, say left camber +3/4*, right camber -1/4* and left caster +1*, right caster +2.5*, you would have a 2.5 degree pull to the left built in with possible outside tire wear on the left front tire.
It could be "in specs" but you wouldn't be happy.
I like about 1/2* pull to the left built in between camber/caster together to offset road crown from the right lane. If you're going straight down the race track, matching left/right caster and camber would be ideal.
The alignment machines nowadays, show green "in specs" and red 'out of specs". That's all the monkeys know, the color. If it's green, it must be good.
If I took your car and set it with the left at the lower end of the range and the right side at the upper end, it would be "in specs" but it wouldn't go straight down the road and could wear the tires.
I could also put the left side barely past specs but matching the right side and it would go straight with minimal tire wear.
In a nutshell, it ain't the machine, it's the man.
Charlie F knows what he's talking about and has posted about preferred track specs. Do a search on his name.
Edit, Charllie already did his own search.