Psychoanalysis (Freud and Lacan) will always stand a bit exterior to the rest of the history and practice of psychotherapy more generally. I only have vague familiarity with Lacan, but with Freud I am quite comfortable at this point. He has been orienting my own practice and thinking lately.
Therapeutic practices absolutely are tied to their social grounds, even psychoanalysis. The importance is how self-aware are these therapies. Psychedelic therapy is not aware at all of where it is in time and politics, and that's a huge shortcoming, because, like humanistic and behavioral psychotherapy, they are vulnerable to reproducing current structures in individualized forms.
That book has been on my radar!