It's not a stretch, real porn is also gay. Exponentially so as more dicks are added to the scene. So real porn is made often by a team of men filming at least one other mans body with the intent of arousing other men and inspiring them to pleasure a penis, it's gay, simple as that.
Likewise lesbian porn is often being filmed and directed by men even when it claims to be "by women for women" and it's generally assumed within the industry and market research backs this up that women in general tend not to consume porn via video or video games and lesbians in particular are very wary of anything the pornographic film industry produces. The result is that most of the "by women for women" studios are in fact still being directed and produced by men, and even when women are mostly at the helm it's still being made with a male audience in mind because the target audience they claim to be targeting is just not interested in their product for the most part. A lot of men however, fetishize lesbians to some extent or another and as such are willing to throw a lot of money at a studio that produces good authentic lesbian porn. So yeah, in that way even lesbian porn made by women for women is still gay, it may be made by women but it is made with the intent of inspiring a man to pleasure a penis.
