If he/him lesbians make the trans community look bad, it's the fault of the people not understanding what it means or caring enough to think about it in depth, a he/him lesbian is a more specific term for a pronoun non-conforming lesbian.
Trans people who don't pass are harder to understand to cis people, but does it mean we should leave them behind to propel ourselves forward? No, that's a horrible thing to do.
He/him lesbians are valid.