If a torque value is shown for any termination, they mean for you to use it. After all, it is a part of the "Listing & Labeling' in 110-3(b).
I have two torque wrenches & a torque screwdriver. When I got the screwdriver, I ran a little experiment. I had electricians tighten the screw on a Square D 1 pole 20, listed torque value of 35 in/lbs, highest of all 1 pole breakers. Most guys tightened the screw to 25 in/lbs, which means they were 28% shy of the correct value. No one ever made it too tight.
Next, I set the screwdriver to 35 in/lbs & let them try it. They all thought the screw was about to strip out.
Personal experiance has shown that 25 in/lbs on a Square D single pole 20 breaker is tight enough, but that doesn't make it right.