In general, T is a more safe place to bring all the "ugly" and be able to work through it with minimal judgement... I say generally because all of the recent switching of therapists has minimized that sense of comfort.
T is also a "neutral third party" that can provide better reality checks about things. She's not emotionally involved (or not as much so) as my family or friends. In theory, she listens and hears me rather than just trying to solve problems.