Not everyone uses their rifles in the same way or for the same reasons.
Flat absolute statements of “good enough” may not be for some folks.
Just because you don’t have the need to take a shot at 200 or longer doesn’t mean someone else doesn’t.
We need to stop assuming everyone has the same frame of reference.
The truth is a 50 yard zero does not always equal a 200 yard zero and if you are looking for the ability to make a 200 yard precision shot, which is something the AR platform is completely capable of, you need to confirm at distance.
That's kinda what I was thinking too? Zombie shots at 200 yards? Taking out a neighbor down the street at 200 yards? Didn't think so.
Most defensive uses would be even inside the 50 yard mark, or 10 or less like you mentioned.