I will be the first to admit that I don't NEED the diesel (very little towing/hauling). I really don't NEED a F250/F350....but I want it. People can argue between what is needed and what is not needed all day long. Do people go out and buy a corvette/mustang/challenger/any sports car because they need it? Nope.
For me, I am a guy with limited mobility and having a toy, such as a sports car, is physically impossible due to unable to get in and out of low cars without falling on the ground. I had a 66 Nova which ended up sitting in my garage since I was unable to get up/down off the ground to work on it. I sold it, used the money for a F350 Tremor w/Diesel. The truck is now my daily driver and toy (which can do whatever I need whenever I need). Now that I have the truck in my possession, I am just as happy as any guy/gal driving a new anything.
To each his/her own. I will say that I know have a stick in the fire to try and persuade the wife in getting a camper.