My niece, going through a difficult patch with relatives at the moment told us "I've got a therapist, but all she does is tell me to breathe." I had to laugh aloud, because while this is (likely) an exaggeration, it may not be much of one.
I'm pro-breathing. I am even pro- breathing exercises, pro- controlled breathing, squared breathing, intentional breathing, remembering to fully exhale, the lot of it. These do help. It is good to have your body on your side working for you in a tight spot rather than working against you. But it is not very instructive about what ails you, and is not very emotionally satisfying.