IMO, yes, as long as it is done in a scenario where the person is safe and gets validated, and is allowed to express the trapped emotions. We are actually designed to seek comfort as well as have a need to talk about things that have threatened us.

Unfortunately, many people are trained to think they should not talk about their problems or challenges. And if someone has been exposed to emotional or physical abuse it is typically engrained into them "not to tell" by the abuser.

IMO, it is important this is done where the person is not in a situation where they face disbelief, or dismissiveness by others. I have experienced that first hand, and it really aggravated the PTSD symptoms in me.