For some Porsche owners money's no object, sure. That's who the care is made for
For many owners of e.g. the Carrera S, they can afford to daily-drive one, but they can't afford to track it regularly with all the extra bills (collision risks, general repairs, consumables, and track-oriented upgrades that even that car will eventually need at a certain level of involvement) it entails, which go *far* beyond the initial purchase cost of any car.
I guess part of my point of view now is that I've come around to the idea that there's little point in a car being any more than "sporty" on the street. Either it's a track car, or you're in it for comfort (and then it's a nice thing if it can handle ok and has some oomph in the pedal, but really who cares beyond that). Driving a Z as a track car costs in the same ballpark as driving a Carrera S as a "sporty commuter car", but the Carrera guy is having way less fun with his.