This is becoming highly philosophical. Too much so, I think. When does someone become a true soldier? Do you have to be Mad Dog Mattis or Mark Milley or James T. Kirk? When does someone become a true physician? Do you have to be Galen or Edward Jenner? When does someone become a true writer? Do you have to be Mark Twain or William Shakespeare? I think there are many true soldiers, true physicians, and true writers. And they could legitimately call themselves that on day one (completed basic training, completed medical school, wrote their first article for the New York Times, etc.)
I am a master diver. A "true" master diver. I don't advertise it. I don't use a patch or a bumper sticker. I don't even think to mention it unless it comes up in conversation. I don't have a thousand logged dives. I don't have an autographed photo of Jacques Cousteau. I own only three cylinders, four regulators, two wet suits, and one dry suit. I probably make stupid mistakes once in a while. Sometimes I even find myself saying, "Oh ****, can you open my valve?" after I'm suited up, fins on, mask in place, and standing on the stern of a boat just about to stride giant. But I remember my training. I know when to jump in and when to call a dive. I have no doubt that I earned the distinction in a thorough and rigorous training program and I appreciate and remember the lessons.