My son is into mechanical watches but he's also into shooting a black powder muzzle loader. Before he got into that I thought you'd be crazy to shoot a gun without cartridges but I found it was pretty fun when I tried it out.
Constraints bring out creativity, and that is often fun. Film photography is more fun than digital photography. Driving a manual transmission is more fun than auto. But obviously if you had to do either for a living, you would pick the less fun but technically better options. :-)
