My iron sights never run out of battery power, and they are a whole lot sturdier than glass in an aluminum tube.
However, if I'm trying to make an accurate shot at greater than about 200 yards, I really, really am glad that I have a 'scope.
I have successfully competed, man-vs.-man, at 600 yards using iron sights, and I have made useful hits at 1,000 yards with them too. All it takes is practice and concentration...and good technique.
Could I do the same today, more than 20 years later? Nope. I don't think so. I've no place to practice, which has made my skills pretty rusty.