If we take that argument further then anyone who owns one of the sports range of Ducati's shouldn't ride it and we should all be on C90's!
As couch says, need and want are two different things and if you want more power - GO FOR IT!
I don't need all the power the 998R gives me but you should have heard me laughing in my helmet when I'd get into the power out of the hairpin onto the start finish straight at Jerez - the front wheel would come up and the bike would just take off. I don't need that power but by god it brings a smile to your face when you crack the throttle open!