So you actually just agreed with me. Your orginal statement was, "there is no difference shooting irons or a scope on this course of fire." With less than excellent eye sight, you will shoot better with a scope. No excuses. It helps overcome a deficiency.Can't speak for others, but *I* do not have great eyesight.
*I* used to hide behind the excuse of needing a scope.
Then *I* decided I wanted to shoot well with irons, and trained that way.
Got my patch with open sights... on a tube-fed, no less.
Still think a lot of folks hide behind the glass. Try it with irons. Once you can make the grade with irons unsupported, then go back and try glass from a rest and watch how small your groups get!
I do agree that everyone should become proficient with irons though. You can still learn to shoot very well with irons and less than perfect eye sight.