I think you read too far into things. Lesbian is the most common because a lot of men want to watch women without other men in the mix.
And I don’t believe LGBT as a whole is fetishized as much as just lesbian for that specific reason. It’s an easy one-term label that gets the “just women in the video” point across.
I was thinking the same thing, I always drop the flour by a bit to get that effect. The only way to make chocolate chip cookies imo