No, i don't believe you are correct. When using the fiber optic sight, one doesn't see the button. What you see is the light transmitted through the fiber. What is seen is the diameter of the fiber whether or not there is a knob. The knob doesn't play a roll in what the eye sees whilst sighting.

Also, using super glue is detrimental. The glue interferes with the light getting into the fiber optic, thus the sight doesn't appear as sharp or bright.