Just because you have got near the peak power of the rev range doesn't mean that you should grab another gear, the power curve doesn't fall off a cliff once you've passed the peak.

The ST will make more power at 7000rpm than at 3500rpm so it is not a waste to take it past the 6000 peak near to the limiter, then when you do change gear you are going faster so you are higher up the power curve when in the next gear so you don't have to battle through the c. 50bhp @3000rpm stage.