London HEMS has a published 20% survival for prehospital thoracotomies performed for stab wounds.
If they can save 1 of 5 patients in the ambulance there's no excuse for not trying in the emergency department.
There is no point unless you are in a trauma center. In the community surgeons would. Never come in for this. Thoracotomy is futile unless the patient can be transferred to the OR ina timely manner.