I'm sure 80% of expert therapists in any modality will disagree.
At best, AI can compete with telehealth therapy, which is known for having practically no quality standards. And of course, LLMs surpass "no quality standards" with flying colors.
I say this very rarely because I think such statements should be used with caution, but in this case: saying that LLMs can do 80% of a therapist's work is actually harmful for people who might believe it and not seek effective therapy. Going down this path has a good probability of costing someone dearly.