In most self-defense situations, your target will be close enough that traditional aiming by using the sights won’t be necessary. For the most part, the threat will be there right in front of you, no more than a few yards away.
Generally speaking, this is the case because an attacker wants you or something you have.
To get what they want, they must approach you within speaking and grabbing distance and as a result, they are close enough.
They have said or done things that let you know they are a true threat as opposed to someone making threatening gestures from across the street.
There are very few times that shooting an attacker at a distance such as across a street is appropriate. You carry to defend yourself and most threats must be up close and personal to warrant deadly force.
In fact, if someone is shooting at you from across the street, your best action at that point would be to get behind something solid and avoid firing shots back. You never want to risk a stray bullet hitting a bystander.
As a citizen carrying concealed, you are primarily interested and licensed to carry for self-defense. Most offensive shooting is best left to the police who are trained for such situations.
Author Jim Malo talks about how sights are not usually needed in his article “Pistol Perfection” on USConcealedcarry.com:
“One thing that may save you is the point shoulder (point shooting) method of firing your weapon. You draw the weapon, focus on the center mass of what you see coming at you, point the front of the weapon (the muzzle) at the center mass and press the trigger, using a double tap. You will be amazed at just how close the shots will fall.” (Read more from Malo at USConcealedCarry.com)
The process of lining up the sights adds time to your response and that extra second or two can mean the difference between surviving and getting shot.
It is important to note that target practice at the range is still incredibly necessary. Using the sights to accurately place shots on targets helps you get to know your weapon better and use it more instinctively.
Practicing with your firearm helps imprint how it handles into your mind. Take every available opportunity to practice shooting both with and without using the sights. You may have to defend your life tomorrow.