Being near-sighted and over 70 years old, I have trouble focusing on both near and far things at the same time.
The laser allows me to aim the radar without moving from the bench, stooping over, and squinting at that little notch and whatever is beyond.
Consequently peep-sights work better for me than the traditional iron sights on rifles.
Since I am mostly a simple lever and break action guy, I don't use scopes much.
A properly fitted shotgun or double rifle you dont really look at the sights anyway....just the target.
Whatever works for someone is the way to go.
Experience eventually tells you what that way is.
Anyone who now has trouble with iron rifle sights and doesn't want a scope, try an adjustable aperture peep-sight: