Many of these snub nose revolvers are meant for point shoot and not point of aim shooting. That is why they are not very equipped in the sights department. The Idea is that in an adrenaline induced state when you are faced with a fight or flight response, fine motor skills and focus are not going to be available and sights will be of little use to you. That's why they say to practice because it is a matter of muscle memory where your point of aim naturally follows your point of focus. I am on the fence about the lasers. They may be great for punching paper, but I am also concerned that they may induce some bad shooting habits.
I'm not an expert by any means, I don't want to come off that way, this is just what I was taught.