Reducing bisexual experience around oppression to the visual aspect only, necessarily means erasing all those other aspects of bisexual oppression that aren't perceived as visible or intuitive.

Bisexual passing also exposes the often-invisible structure of monosexism, since by crossing the monosexist line [by passing] we show that it exists. Our passing also threatens people's own "pure" identities, because despite the fact that we may look or act like them, we are not in fact like them. This means that we represent their anxiety of being "polluted,

It means understanding that different kinds of oppression are interlinked, and that one can't liberate only one group without the others. It means acknowledging kyriarchy and intersectionality - the fact that along different axes, we're all both oppressed and oppressors, privileged and disprivileged.

Privileged people can feel the way these identities threaten their privileged status and the benefits that they receive as a result. For this reason also, trying to reassure hegemony that these identities are not a threat to it (for the purpose of being "accepted" into society) is moot. Hegemony is right to feel threatened, because there's no way one could change social order without deconstructing power.