Sounds like her FB page doubles as an advertisement for her modelling work...

Dropped on her head as a baby? I don't find anything brain damage worthy in her actions, she's just different to you, different to what you wanted and expected, not damaged.

Also nothing fishy about her avenue of studies, maybe she's so comfortable with her sexuality because she understands and accepts herself...
Maybe her studies helped her reach that point, maybe its exactly why she doesn't allow any obscene comments to offend her.

I don't see how the policeman analogy applies to her at all, what has her sexuality got to do with her ability to be a therapist?

It's ok if you don't like what you see, it's ok if her FB page made you change your mind about her, but its not ok to pass judgment on something you clearly have no understanding of.

For all you know its just a publicity stunt and you're worked up over nothing, only way to be sure and to make up you mind in a fair and objective manner is to ask her what is up with her FB page.