I think the quality of the human connection is important. The Dodo Bird Verdict[1] states that the relationship and connection between a therapist and client is the true healing factor. Indeed, a strong causal factor on client outcomes is the attitude of the therapist; whether they are warm, caring and genuine. The therapist-client relationship accounted for 7% of the variability in outcome, whereas adherence to a specific treatment accounted for 1%.
On an individual basis, the specific treatment matters, but statistically the human connection matters more. Your standard “what did you do on the weekend” friendship won’t cut it.