I honestly do believe that there are things that seem "screw-up" to certain Trans therapists; many do look for, say, gay men who believe they are Trans but truly wouldn't like it in the long run.
Honestly, my opinion is that the human psyche isn't all that set in stone, that a person's strength of the need of transitioning usually reflects (sometimes justified) inadequacies somewhere else in life; for example, I'll readily admit that if I was given the choice between being President of the United States and Transitioning, I'd probably choose the first option (as something of that caliber actually could take my mind of transitioning, I know it's true.) I've spent 15 years of my life dreaming and scheming to have careers of almost that high of caliber (acting, writing, singing, filmmaking, politics, ect ect), because, for better or worse, I am capable of seeing things beyond gender, that there are possibly more important things in life than being a certain gender (especially things that can help millions of other people.) Given the choice, there's a lot of things I have always wished to do with my life, and I'll certainly say that I've made many back-up plans for my happiness just in case, say, Transitioning became outlawed.
However, one teeny tiny horrible problem with my life goals that could potentially take my mind off transitioning is that, to achieve my life goals (acting, writing, singing, filmmaking, ect ect), I have to better my confidence and physical image, which, because of my over-production of androgens that are causing all sorts of deformities, I basically have to transition anyway, at least to an anti-androgen extent. Without at least that, I do not have a hope of achieving anything I've ever dreamed of, wether it's transitioning or certain careers. It really puts me in a tight spot. I literally look like a greasy old drunk sailor, and that type of man (or woman) has no chance at succeeding in any sort of media field, it hasn't happened in literally decades upon decades (not since the black-and-white film eras or before music videos existed.)
Sadly, a therapist would hear all that and think I'm a lunatic, that I must not be a true Trans because I'm not ready to go out and kill myself if I don't have hormones right that second and because I am capable of thinking of other things in life (despite the fact that Trans who think like that are regularly locked up), so it's really confusing for me to open up to them. A therapist's favorite patient is the person who lives the most normal life possible, someone who goes to college or works at Home Depot with a wife and two children, and really, everything I ever say is about the farthest thing from that.
So basically, wether it's that a therapist thinks you're a gay guy who's tempted to be a girl, or wether you're 10x smarter than the therapist is and they want to get revenge, chances are anything you say will be a red flag, and the best thing to do is treat the therapist with smiles and respect whenever possible, and put the foot down when you feel the session isn't going your way. As always, I recommend using the threat of talking to a lawyer if things get out of hand in the session, as therapists, under the guise of "tearing down the layers", can become quite rude, defamatory, and downright incorrect in their attempt to push their views on the patient. Therapy is the patient's ball field, and it's the patient who's both paying for it and choosing to talk with a professional.