I think that if you are hanging around forrest with a gun and shooting that gun in the night, you probably should not be someone with poorer then eyesight in the night.
Saying that as someone who occasionally returned late from hike and would prefer not to be shot by hunters.
You're not hunting deer in the dark. You're getting to your blind before sunrise or you could be recovering your deer in the dark from a day time shot.
In that case, you can put away the gun and use the light.
The point is that the activity of hunting spans over an entire day and certain activities can be performed before sunrise or after sunset and none of those activities involve shooting a gun.
If they are looking for a deer they have shot few hours before, they can put away gun and walk around using the light. The lights are not allowed when they have guns with them.