Why? I street ride and once in awhile go to to the drag strip and race against other street bikes and also enjoy the rush from speed, MPH seeing the numbers and the feeling.
I owned a VMAX which held the legend of being the 1/4 mile King for many years. When I was beaten with technology I installed Nitrous to hang with the big bore street bikes on the dragstrip, after blowing 5 engines I got tired and bought a Hayabusa.
Yes, I want the power and I use it but if there is someone else that is building a motorcycle within the same price range then I may. The straw that breaks the camels back will be when a ZX14R passes me and I cant hang with it
Watch out for the 14. Gen-for-gen they are quicker.