Yeah. Personally I know too many people who have been helped through therapy to assume that situations like yours are the norm, but I understand the fear, and I have no idea how common they might actually be.And the fundamental trigger for me is the power imbalance. The situation where the professional could say that I said or did anything and be treated as reliable. Whereas me trying to defend or protect myself is taken as a sign that I'm clearly too sick and need to be forced back to treatment (with the same person causing the problem).
And I don't trust all the reports that say this doesn't happen or isn't common. Because as far as any official statistics go, what happened to me and other students didn't happen. And people who tell me that there's nothing to worry about tend to turn around and say I must be wrong about what I remember happening.
I kind of wish there was a service people could go to/call where you could vent, and they'd try to help you with issues, but without any sort of medical authority over you. Maybe even something anonymous. Something like the various LGBT help lines that exist, but for general use. That might allow folks with trauma like you to be able to talk with someone without the trigger you have being set off. I don't know if such a thing exists, (one does here in Canada, but solely aimed at kids/teens) but it feels like it would be helpful for a lot of people.