Fujoshis don't want to date straight or bi men because dating someone who is openly attracted to women makes the fujoshis feel like their partners don't see them as "real men." To be fair, maybe they're right--but given that gay men aren't attracted to women, straight and bi men are fujoshis' only potential partners.
I mean, I say "only," but there are way more straight and bi men than gay men. That's what fascinates me about the decisions of fujoshis. A lot of their transition clearly has to do with getting access to a new dating pool--I've known women who lamented for years that straight men didn't find them attractive, only to troon out and act shocked when no gay men show interest in their Grindr profiles. Well, yeah!
When 95 percent of the men you meet are attracted to women, you can probably find at least one guy who's into you as an ugly freak. After taking testosterone and cutting off one's breasts, not only are the gay men fujoshis pursue still not interested, but most straight and bi men become turned off by her new secondary sex characteristics. But tranny chasers are gross, so they aren't an option, either! No wonder this lady is dating an anime character. She's cut herself off from every other group that might want to fuck her.
Someone once said that straight people don't realize how convenient it is living with 95 percent of the sex you're attracted to being attracted to your own sex, and I think straight girls who transition epitomize that lack of awareness. HSTS, lesbian transitioners, and AGPs all are willing to fuck within their own groups, but straight women are shit out of luck. They sometimes "date" each other, but they're still looking out for their dream gay man who is actually straight.