For some people it's important to ride a bike designed for racing.

Professional bike racers would never ride to the grocery store for a loaf of bread. They train hard and race hard but the rest of the time they rest. Some have elevators in their two story homes so they don't have to climb stairs!

The roadies who post here in the hybrid forums don't even have racks on their hybrids! Roadies who do use racks put them on one of their other bikes, not their race bikes.