Nezchan's response was perfect. She touched on all the tropes/memes involved in a concise way.
I will make one small concession to the trope, namely that if you're bisexual, and you get raped by a man, you might very well be turned off of or frightened by sex with men, at least for a long time, and to people not thinking in terms of bisexuality, as bisexuals are often erased by both gay and straight people, it would look much like "she was straight but became a lesbian because she was raped."