I was a DM for a year before going through the IDC. I wanted a career in diving and after graduating from college it seemed like a great direction to go in. I knew I could make a difference in the industry and I proved it through teaching a course more based on actually learning how to be a better diver.
Anyone with a good head on their shoulders can pass the IDC. I think the biggest issue is, do they belong teaching. Just because you CAN do something, doesn't mean you MUST do it. People talk about being an instructor like its a fad or something, but its serious business. If you aren't going to bring something new to the table, what's the point? There isn't much money in it and once your an active instructor, you will always have your guard up and its much harder to just get wet without constantly thinking about everyone around you.
Anyone with a good head on their shoulders can pass the IDC. I think the biggest issue is, do they belong teaching. Just because you CAN do something, doesn't mean you MUST do it. People talk about being an instructor like its a fad or something, but its serious business. If you aren't going to bring something new to the table, what's the point? There isn't much money in it and once your an active instructor, you will always have your guard up and its much harder to just get wet without constantly thinking about everyone around you.