The practice of acupuncture is complex and subtle.  It takes years of training to hone the skills to become an effective practitioner.  A few hours of "dry needle" training is woefully inadequate for those who want to just do "trigger point" therapy.  For one, it is dangerous as unskilled practitioners can easily aggravate an existing condition with dry needling.  Physical therapists do not have proper professional background and training to be let loose with a bunch of acupuncture needles.  Patients are in danger.