Yes, art therapy fills the gap where your verbal brain can't express what is lying in your unconscious. I've taken my art work to my therapist a few times and its really helped pull apart stuck yuck feelings , is depression is for me a picture of me walking in a circle wading in a tub of thick black goo holding my head with one hand and wading with the other, its in a black room with a light shining in the corner.at least there was a light somewhere there but we also realised I'm trying to solve my issues with my head (ruminating) and not my heart or body. Really important to fi d so done qualified to talk through deeper issues.
But to even draw it I had a wonderful teacher who was completely devoid of judgement, which helped immensely, and still does.