This is another dealership high profit margin "extra" that they use to make up for the great deal you make on the purchase price. The sun and its ultraviolet rays is the biggest "killer" of paint, especially reds and dark colors. I do 2 things to protect my paint:
1. Use 3D waterless car wash (20 minute wash and protect) every weekend and
2. Cover the car if it is to sit outside for more than an hour or two.
Number 2 requires that the car is clean. I also use a California duster to remove the very light dusting I see after the drive home or after the car has been sitting in the garage for a few days.
I used to have a Magnetic Red Corvette and after 13 years, its paint (except for some rock-chipped surfaces) still looked like it was new.