Big-Q my perception of physical therapy as a profession is it assists traditional medicine with the healing process of physical injury. It is a restorative process mainly focused on muscles.
Q-1 I think they enhance the healing process of injury and restore the 'memory' of the muscle system involved.
Q-2 Back injury. Electro-stimulation (not sure what it is called) and exercise
Q-3 No, my first choice for back pain is my chiropractor
Q-3 I have a great relationship with my chiropractor and the results have never had a negative outcome. However, this is a personal view based on my experience.
Opinion. I think physical therapy comes down to the therapist, not necessarily its practiced art of healing. Sadly, like much of traditional medicine today it has become commercialized or part of the 'medical' industry. I have trust in that system knowing the limitations of it within the legal parameters & bureaucracy.