That car made peak power at 7500, now it makes peak power at 6500, but I can guarantee you the car runs a hell of a lot quicker than it did before....
You are correct, the fact that some don't understand this concept means they're dyno queens and do not race, or at least don't understand racing. The object in drag racing is to put as much power in a car a soon as possible, this system does that. Obviously if you have a built motor and can run a small pulley already and your engine can handle whatever boost you can throw at it, then yes this system isn't going to be good for you.