Dr2Little, maybe I can come up with a reason why people would choose physical corrections.
When I got Spanky as a puppy, he was very difficult for me to manage. He nipped constantly, jumped, grabbed skin and clothing as we walked by. He was a little terror. We were not enjoying life with the little bugger at all. We had a positive re-enforcement trainer come out for one session to show us a little about how to use the clicker. We didn't get him to slow down at all.
We took him to positive re-enforcement training at PetSmart. We were still miserable.
I joined 2 more classes. Both used leash corrections, one recommended a prong and the other a choke collar. Spanky would do any command, but he was still a monster at home. Both of these trainers suggested leaving him on-leash at all times and give corrections anytime he was doing the behavior we didn't like. This was the worst point for me. He was still a monster, and I was punishing him all the time. I was miserable.
To top it off, these trainers were telling me this young puppy was being dominant, and we were going to have a terrible time on our hands if we didn't get rid of this behavior right away. I was pretty freaked out. I was picturing a dominant, aggressive dog that we had, none-the-less, gotten attached to, and not being able to live with him
I finally got the recommendation of a behaviorist. I had his name all along, but he had a waiting list, and I was impatient because Spanky was driving us nuts!! He told us he generally came for 6 visits at our house. All training was off-leash (so I knew I would no longer have to be following him around and yanking his collar, yay). He came in the first day and sat in my living room and talked to me and ignored Spanky. Spanky was so excited, he was wanting to grab his pants, etc. Very soon after he got there, I guess he quieted down for a second, and click/treat.
It was amazing the transformation that Spanky had with this trainer. The trainer said he would occasionally have one that he would have to startle with noise or something that he said many positive re-enforcement trainers wouldn't agree with, but he seldom needed that.
All of this to say, I did resort to physical corrections when the other wasn't working, but the physical corrections made it worse. I believe I wasn't trained the proper technique initially for positive re-enforcement. But that is why I tried it. The trainers who used physical corrections had me convinced that I was going to have an aggressive dog if I didn't handle it better.
This trainer who finally actually helped me, convinced me on the first visit that my dog couldn't be farther from being aggressive or dominant. He said most of his work is with people who are having major problems, and he's worked with alot of aggressive dogs. Spanky wasn't one of them. That might have been the biggest help of all. Once I finally saw Spanky as a puppy and not as a potential full-grown problem, I was able to settle down
and give the positive training a chance.
By the way, this trainer also works with horses, and he uses clicker training with them, too.