I babied my T2 and it died an early death because of this, but I'm not sure this is a good comparison (Rx7 versus piston engine). Each face of the rotor only sees 2/3's the combustion events a piston sees at the same rpm. Rotaries need high rpms to burn off carbon buildup on the rotor faces, otherwise chunks can break off and jam between the housings and apex seals, breaking the seals and destroying everything in its path. This isnt so much a problem with piston engines breaking rings because carbon.My friend bought a 90 RX7 GXL and it's motor died b/c the previous owner never revved it past 3500. Those motors NEED to be revved if you want them to last. This is the same for most engines, even the K8 or KL motors.
Reving a piston engine up that high? I would say if you keep your oil changes timely, and especially if you use synthetic oils, it shouldnt be too much of a problem, unless you do it every freaking time you shift. Dont expect your alternator, water pump, and power steering pump and timing belt to set any world records for long life either. Ditto for the clutch. Shifting gears at rpm's too much higher than where the peak HP is doesnt do a whole lot other than make more noise in my opinion.