Honestly, while in the past I have certainly met women of whom I've questioned were "actually" attracted to women or not, upon some reflection and listening to some people claiming the same things something clicked for me.

Are we really seeing an overabundance of "fake bisexuals" or are a vast majority of these cases actual bisexual women who are struggling with internalized misogyny and/or homophobia, both of which are practically omnipresent in reality? Especially when these women kiss women, do it more than once, express interest in other women, and even get into relationships with them -- repeatedly -- but seemingly in ways that appear to be "for men" or "for attention"... even when they are literally doing and saying things that are clearly not straight over and over again. What about we question if these women are "actually straight" when they try to pass off kissing girls as just some sort of ploy to attract a man they don't end up with anyways?

Comparatively, I almost never hear of bisexual men having their attraction to men questioned, even if they're more on the hesitant side when it comes to long-term and/or sexual relationships with them. On the other hand, any expression of sexuality (or lack thereof) by women that is not directed towards men is constantly put into question, or denied entirely. The only group allowed to undeniably be attracted to women is heterosexual men.

My point being: I think the finger pointing of "fake bisexuals" overwhelmingly being directed towards bisexual women is simply another example of the misogyny surrounding female sexuality. Bisexual women are in a unique position in which they are women who experience misogyny, and are also not monosexual, which leads to their sexuality being interpreted as, ultimately, a "choice" by many.

Not only is the bisexual woman hampered in understanding, exploring, and accepting her sexuality by misogyny, but her illusion of "choice" makes her fit to be demonized for whatever partner she ends up having. If she ends up with a woman, she is in an imperfect and incomplete woman, and she will certainly regret her choice and end up with a man later. If she ends up with a man, she is a liar, she was never attracted to women, she has chosen to subjugate herself. In either case, she is punished for being a woman with what is perceived to be a choice.

(Though, as a side-note, this does not mean bisexual women are absolved of poor behavior, misogyny, or homophobia. I'm only pointing out how misogyny, and likely a bit of homophobia, plays a role in making it more difficult for bisexual women to figure out their bisexuality, and how misogynistic biases and perceptions -- from both men and women, straight, gay, or bi -- play a role in how often bisexuality is downplayed or denied in bisexual women by others.)