Just wondering what difference it makes if she was born a man but is now a woman?
Why the reluctance to see her? If she has breasts and a vagina, and they look and feel "natural", and she acts like a woman and wears women's lingerie, then what's the issue, exactly? After all, there are women who were born women who get breast implants. There are women who were born women that get cosmetic surgery performed on their genitals (either to "fix" issues after childbirth, or to simply make the genitals match current cultural standards of beauty).
I disagree that she should be advertising as transgender if she has had a complete sex change performed. I think advertising as transgender would be more suitable for someone who was still transitioning, or who still retained characteristics of both sexes (such as a penis in addition to breasts, for example).
I don't mean to stir the pot too much, but I hate to see prejudice get in the way of everyone having a good time! If you're looking to have a good time with a woman, and she is now a woman, then I think you gentlemen should go see her and have a good time!
(Disclaimer: I don't know who this person is, or whether or not she was born a man or woman, but I wanted to raise some discussion points about sex-workers who were born men and who are now women. Thanks for reading

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