I see therapy as a very weird and very rigged game, designed to make therapists feel better and clients miserable. In that context, failure isn't really failure. Seems rather meaningless, even if it does leave some emotional or subconscious mark.

Any human relationship can be healing but therapy relationships seem uniquely constructed for harm.

I think that Lambert guy is full of s**t on many levels, and is typical of the disingenuous and condescending therapist class who spew platitudes about trying to make the system better "for the client", but are just completely self-involved and not interested in looking deeply at core assumptions.