Shock loss has little to do with improper extraction. Improper extraction technique would just result in low or no yield to the implanted grafts.
Shock loss is the loss of your native hair from the inherent trauma of surgery regardless of improper/proper extraction or unsuccessful/successful implantation. It does not matter if the doctor's technique is good or bad, shock loss happens regardless and it's one of the inherent risk of HT surgery. Some hairs loss through shock loss might grow back, but some might not, no guarantees. Meds may help but there are no guarantees either..