A little history lesson: 
The extra wide BOMAR style blades were originally designed for shooting BULLSEYE targets with a 6:00 hold.
Back in the day (late 1970’s for me) everyone started shooting Combat Pistol matches. Because we didn’t know any better, we all took our match “Bullseye Guns” out and started competing in IPSC (International Practical Shooting Confederation) with them. Later, we started USPSA (United States Practical Shooting Confederation) on the back of my old pickup truck.

Sights and sight pictures have evolved A LOT since then and we found ourselves
grinding the Bomar blades down into what some called “Rabbit ears” because we knew the wide blades over rated for speed and not practical for carry or combat. It also allowed us more visual input as we could see more of the target, as opposed to covering more of iit up.
BOTTOM LINE: A ½ inch wide blade is all you really need. It allows us to see more of the target, as opposed to covering more of it up. If wide blades were the way to go then BOMAR would still be in business.