Red light are meant for viewing high-contrast easily-legible maps in the dark while not ruining your night vision, and also to not give away your position as ea

Red light are meant for viewing high-contrast easily-legible maps in the dark while not ruining your night vision, and also to not give away your position as easily as a cool light would. Their purpose is quite specific. I agree that they would be an extreme measure for street lighting, and I think that colorblind people would find them problematic.