In short, even if the theory is true, nothing can be done. More importantly, the theory is illogical. We do not do painful things over and over. We look for ways to avoid them. Cutting over and over makes little to no sense if it were not biological.
People get pleasure from it or relief.
Histrionic PD may and probably is chemical. It is maladaptive, and likely would be changed if it were under volitional control.