Not speaking for anyone else, this is just my experience:

I had a very dysfunctional childhood and family life. I won't go into details, but there was a lot of trauma; emotional, mental and physical. When I first got treatment at age 30, I had a whole lot of stuff going on from both childhood and my adult life. I saw a T for a few years, then my financial situation changed and I wasn't able to pay for it. When I was in t, I talked about things that had happened to me and tried to make sense of them. I don't remember much "healing" taking place, but talking about them sort of helped in outlining the events instead of all of my pain being a swirly mess in my mind. As I've aged, I've come to terms with different things, such as, none of the abuse was my fault. I'm not a bad person, I was just born to people who were more into themselves than their kids. What I did as a child was childish, and has no bearing on who I am today. And occasionally other things fall into place.

Now, understanding those things has helped me intellectually, but, not really affected my depression. I don't know if I was born with D, or acquired it early, but it seems to be a permanent part of me.

To conclude: Just like meds, psychotherapy can be useful and even vital for some people, others don't need it or want it. It can also be used to avoid reality for some, just like meds. Some can be too dependent on their T and there are real reasons for that, others see a T once and are fine with it. I believe therapy has it's place, but like meds, not everyone needs it.