I would not say that there is too good of a bike but I would say....
....there is too good of a bike to leave in front of a restaurant or store with a cheap lock
....there is too good of a bike to be appreciated by the average rider
....there is too good of a bike to be enjoyed for fear of impacting it's value
....people should not buy bikes that cost more than they can comfortably afford
....buying a really expensive bike is not going to make you an appreciably faster or stronger rider
Having said all that, if you can afford it and you're actually going to use it, get what you want.