They could have experienced attraction towards women because of compulsory heterosexuality. Basically they grew up being told they can only be attracted to women so they forced their attraction.

Similar thing happened to me except I’m not homophobic. Didn’t realize I am attracted to men until after I transitioned. I’m not sure yet, but I may actually be more attracted to men now than I ever was to women.

I’m not denying that they could be bi, but I’m wondering if maybe some are just forcing attraction.