The went to three doctors. They all had different advice and procedures. Each of the three claimed their method was the best. But that's the point I've been making. Which expert does the layman believe or trust? The layman then goes to the non-expets like family and friends. Or intuits based on feelings and whether he like the doctor's smile or not. That's what the whole argument is about. I have no idea what point you're making. Maybe you can clarify.
I concur with Alan when it comes to the doctors and their specialties and experiences. Many of them recommend what they always recommended, regardless of the patient's particular condition. I have personally experienced it in several situations. Once, I was having pain in my thigh, and my GP sent me to several specialists in a row - neurologist, sports doctor, rheumatologist, foot doctor. I got Xrays, CT scans, ultrasound, and blood tests. They couldn't diagnose the problem. I went also to three chiropractors, one wanted to crack my back, the second recommended spinal decompression table, and the third electric pulse stimulation. Rheumatologist advised to take Tylenol. Finally, I got to the orthopedic surgeon who diagnosed the hip as source of the problem. Hip replaced, problem solved, 2 months later I was driving, dancing and hiking.