Which model exactly? What type of therapy/prompt? Was it a completely dated model, like in the article where they talk about a model from two years ago? We have had massive progress in two years.
Also it is not expected that the training material for the model deals with the actual practical aspects of therapy, only some of the theoretical aspects are probably in that material
BrickLabs have developed an expert-fine-tuned model specifically to provide psychotherapy. Their model has shown modestly positive results in a reasonably large preregistered RCT.