As Clint Smith wrote in the January/February 2008, American Handgunner
It's alway argued that in a fight shooters will not look at their sights. I strongly agree -- if no one has ever taught them otherwise. To say that people don't, or won't, look at their sights is wrong. People have, they will in the future, and they'll hit the...target too. The correct alignment of the sights is a learnable skill. Is a textbook perfect sight picture available in every fight? Of course not....In fairness, the sights are only part of the issue -- the jerked on trigger doesn't improve anything.
With the proper training and practice, it's amazing how fast one can acquire a flash sight picture and hit accurately. Learning those techniques and developing proficiency in the use of those techniques also gives you the flexibility to deal with targets at pretty much any distance. And whether you use the sights or point shooting techniques to direct the muzzle of the gun in line with the particular part of the target you want to hit, if you don't have trigger control, you will miss.