I like to be able to see it without moving anything, the same way I like to see the leds around the gain knob. It's really that simple. So if something sounds/is off I can see at a glance what it might be. Not trying to convince you to feel the same way by any means.
Thank you! You get it! I can't trust my ears all the time. Its that damn thing called ear fatigue. Having the values or the references values for the EQ make it more easier to tell if something is off in my amp or it its just me!