I mean yeah, you're not wrong, and it basically just blanket assigns a new definition of lesbian as just a woman that doesn't sleep with men, which is maybe not the most accurate definition. (I swear to god if anyone tries to turn this into a struggle session about bi/pan lesbians i will bonk them)

Political lesbianism also has deep ties to the concept of lesbian separatism which is where more of the "lesbianism is mandatory to be a feminist" concept comes in, and may not be covered universally in the literature. And of course, where would we be without the concept of explaining absurd concepts to people without taking those concepts to their ultimate conclusions.