What is the major drawback of psychosurgery as a therapeutic technique?

A) recovery takes many weeks
B) its effects are irreversible and not predictable
C) it is expensive to administer
D) many people find the concept offensive

The major drawback of psychosurgery is that its effects are irreversible and not always predictable. Once brain tissue is removed or altered, it cannot be undone, and it is not always clear how the surgery will affect the patient's cognition, behavior, or personality. This makes psychosurgery a last resort treatment option for severe, treatment-resistant mental illnesses.