I have been shooting handguns for over 35 years and never used a laser for the first 30 years.
I now have CT lasers on two of my handguns. Has this changed in anyway the way I train and practice.......no of course not I still use the iron sights. The laser is basically a backup sighting system for low light and if needed in an "uncoventional" shooting siuation where you cannot properly aim your weapon using the iron sights, which many shootings turn into quickly. Lasers are not a substitute for proper training and pistol craft. But, they are another arrow in your CCW quiver and can possibly help save your life. I don't have to look for the dot, its where I am pointing my gun anyway but if you have to aquire the target after being shot or sitting or laying on your back or for any other unconventional position it can diffenently help you stay alive and win the fight.