It's that RLT thing I swear, it is a structure that doesn't allow for individuality. They have an idea of the gender roles, expectations and stereotypes that a lot of them possibly get too focused on.
I guess they have to make sure that you're going to blend in with society well enough to live a happy life and not have any regrets because you can't pass.
I wouldn't be surprised if they let the pretty ones straight though no questions asked but the ones that physically have more uphill battles have to jump through more hoops to prove ones self.
They can only get inside your head so much to determine ones gender so the physical is no doubt something they consider, from their side of the table something quite important.
IF this is true then it's unfortunate.. because really only subjective personal opinion can really be used to determine whether one passes or not, so some therapists are going to seem nicer than others... but also in a way good because it can be easy to convince ones self that you pass well enough when it's a percentage thing. Some people will pick you some won't. I though I used to pass well a year ago but now I look back and think wtf?

compared to now at least.
I guess it can also be viewed as a double standard, you can have one therapist convincing you that you have to learn to accept who you are before others accept you so you do that and then a psychiatrist says nuh uh. *shrugs*.
It is our life if we are ok with what we are going through then shouldn't that be enough? Are they seeing doubt because they let their own personal opinion get in the way? The fact you can go to one doctor and get a no and then go to another doctor and get a yes speaks volumes.