Are you sure it's undertones on authority or on corruption and regulatory capture that conveniently lead, misguided government and its powers to demonize what are turning out to be far more effective treatment options than the patentable medications big pharma promotes?
While therapists are of course also doing business or at the very least earning a living by providing the therapy, and it's thus true they might not be entirely disinterested, they may well have genuine concerns on the psychological and emotional safety of their patients. The combative and even arrogant attitude the early pages show towards well-intentioned professionals is, IMO, unwarranted.
I think the general message he's trying to get across re: therapists is that even the best intentioned therapist ultimately puts a ceiling on one's personal growth, as the dynamic inherently implies that the client in some way needs the therapist to heal. And that therapists have little incentive to acknowledge this dynamic.