That at least explains it's use on some airline's were the pilots have flown less than competently.
Rainboe,
Congratulations! You've managed to convince a young enthusiast that if he ever sees the SB used, it's because of pilot incompetence!!!!
In a perfect world, descent without recourse to the boards is great. In the real world, any number of unforeseen things can happen, and use of the brakes should not be discouraged. It's a flight control. It should be used as necessary.
I used to fly with a guy who was so caught with the "Brake up = F@@@ up" mentality that he would fly extra track miles rather than use the brakes, somehow believing that was more efficient.
After TOD, getting the aircraft on the ground as soon as possible is the most efficient thing to do. If circumstance leads to being high or fast, the Speed Brake is that most expeditious way to correct that. The MOST important thing is to achieve a stabilized approach, and attitudes that preclude using available controls to achieve that are dangerous.