The surgery you are talking about is arthroscopy surgery, and it's not all that new. However, it is being looked at more closely as an improvement over the traditional approach of simply placing the shoulder in a sling. Physical therapy is an integral part of the recovery process, regardless of the treatment approach. Since it's your body, you need to have a say in how it is cared for. That said, many surgeons prefer not to operate if the plan for rehabilitation afterward can't be agreed upon. Discuss your concerns with your surgeon.