For me, her giving me insights into how stuff that happened in the past had an impact on both my childhood and my present-day life is super helpful.

And in the same vein, her helping me figure out why people in my life may have done / said the stuff they did has been incredibly helpful.

Mostly because I often feel like I'm flailing in absolute darkness when it comes to understanding both myself and other people at a basic emotional level.

I don't think either of those things could be done by anyone other than a trained professional or at least, I'll likely dismiss it coming from anyone else (and that's even assuming that I was willing to disclose stuff in such detail to anyone else).