I run 60+ miles a day (just to get to work and back) and also use the NC for errands and shopping during the week and weekends. The itty-bitty fuel tank and horrible mileage when loaded and at speed mean that sometimes I have to fuel every other day. That is insane. Did it for almost a year, then started carrying an additional 3 gallons of fuel. I've had my low fuel light go on at 120 miles when running fast and heavy on my I-95 commute.
Is it necessary? No. Does it add practical utility to the motorcycle? Yes!
Until you have had to refuel every other day or so for a couple of months you probably wouldn't understand how annoying it can be.