Everything about a guitar can be fun (apart maybe from it going out of tune). The thing is, however good you are, there are sounds you can only get with a capo, and if they are the sounds you want, that's how you get them. And if you don't use a capo on priniple, you'll never have those sounds available.

When Buddy Holly had his drummer tap out the rhythm on a packing case on some songs, it wasn't because he didn't have a drum kit. That was the sound that was wanted.