It's not that bi isn't "normal-enough". The half-clever shitheels have been trying to split off bisexuality under the guise of "they could pass so they aren't really oppressed like homosexuals". Keeping people divided to make it easier to oppress them and all that. Then you get people like this who probably have no conscious awareness of that intentional strategy but have been stewed in this shit-pot enough that they talk in terms of lesbian-gay with out even noticing.