I didn't say that nobody ever wrote about them, I said that they were "pretty much invisible."

And yet, there were stories about them, going all the way back to the pulp era. So hardly invisible.

I don't bitch when there's a black guy as the captain of a ship, or a lesbian couple in a story. I bitch when those characters seems to be underlined and circled in red, as if to say "Look how inclusive I'm being!"