I respect a whole lot of thos instructors who say night sights arent necessary.
Then I stand in my living room at night where there is enough light for me to identify you as a threat or not, but not enough to see my fibres, and think of all the other places I find myself in with similar lighting conditions, and I find myself liking the idea of night sights with a brightly painted front sight , as the iron sights answer to carry.