most psychodynamic work is not focused on making interpretations, and most interpretations will likely go over the patient's head. We call those interpretations that lead to meaningful change "mutative interpretations" and most such interpretations occur in the transference affect. The transference affect is the more readily accessible feelings that the patient has about the therapist. Most psychodynamic work focuses on the relationship between the therapist and the patient, and the patient may discover (or the psychiatrist may reflect) that their response to the therapist is an enactment of behavior in other important relationships. In your example of someone who avoids close relationships (unlikely to be due to conflicts with their parents per se), this will almost certainly come out in their relationship with the psychiatrist. They may desperately wish to be cared for and understood, but rebel against the unfamiliarity of it and fear dependence on the psychiatrist who they fear will abandon them or reject them as a parental figure did. It is not some intellectual realization that will lead to change (and in fact there is the danger that the patient or therapist, especially if obsessional, will use intellectualization and interpretations as a way to hide from powerful feelings or resist change), but the affect generated. When the patient experiences the warmth and holding environment of the therapist - someone who genuinely cares, who won't abandon them, reject them, scorn them, invalidate them - and can tolerate and help them to experience and manage powerful feelings, they may begin to feel safe with letting others get close to them.