Firearms are fun. Knives are fun. Martial arts are fun. At least to a decently large number of people. That doesn't mean that their roles in society don't suck.

One might say that the danger (to people, to society...) outweighs the benefits of allowing target shooting as a sport. Maybe, I'd still disagree, but that's an opinion we can argue about. We don't allow people to build their own nuclear reactors for fun, for example. But saying something isn't "fun" is ignoring that a lot of people perceive the world differently.