These choke tubes aren't that dirty are they

A guy brought in his 687 Silver Pigeon 3 the other day to have me clean. Gun was rode hard. These are pictures of the choke tubes. The insides were really caked up and the one picture shows what the inside of the tube looks like after using a brass brush on a drill. Geez what a mess. Why do people let their guns get in such a state before they do something about them. I guess some people are just too busy, but hey more money for me.