The key to consistent, accurate shooting is repeatability of the shot mechanics.
The reason the standard shooting approach is so popular is because it is simple and therefore more easily prepeatable. When you miss a few, you can go back and adjust your mechanics. (You see pitchers with this problem all the time)
Years ago they did a study of the most accurate shooters in the NBA and compared their shot mechanics to the most erratic shooters.
They discovered that the elbow position of the best shooters never varied by more than a couple of degrees. The most erratic or streaky shooters had elbow positions that varied by a lot (10, 20 or 30 degrees - I forget the exact number)
You can have a hitch in your shot. What you can't do is have variation from shot-to-shot attempt.