A news clip that used to get a lot of play shows soldiers crouched behind a barricade in Saigon during the Tet offensive. Each in turn, one of the men would raise his M-16 over the top of the barrier at arms length and spray random automatic fire. Surely, the NCO to whom these men were answerable was not pleased with their performance. This kind of celebrity will not endear you to your associates. Pointing a weapon in the general direction of the target and letting fly with a magazine full of ammunition is not likely to have a good effect.
Effective fire is well disciplined and aimed.
Conversely, even the bravest of soldiers will be put out of action by solid hits. Marksmanship has historically been a distinguishing characteristic of the American freeman. Skilled shooting is learned, it is a discipline. The proper foundation must be laid, and built upon with consistent practice. Shooters must become intimately familiar with their weapons and the principles of their effective use.