Yeah that's nonsense. I have attended low light instructor courses and did a LOT of night fire. The three dot system works. Blacked out rear sights for night sights makes no sense to me. I am 75 and I need the reference for sight alignment.
One of the most frequent complaints I got from citizens was the mess pranksters made. When we caught them we often just made them clean up their messes but some ofc
those"innocent" pranks caused real damage.
You are looking at the,wrong night sights. Trijicon HD Night Sights have three dots, one in front and two in the rear. Most night sights are like that. Welcome, join us,and learn new things while being entertained.