Consider "breedable" to be imperfect shorthand that doesn't capture the entirety of sexual attraction, but provides a simple baseline for using the [F] tag.

There's plenty of other tags to use, or !transgonewild@fedinsfw.app

EDIT: In response to your edit, asking a question and getting an answer you don't like isn't transphobia, or trolling. I don't "keep" doing anything under your posts, and only engaged directly with you in this single post, after you engaged with me.

How would you put that politely?

I respect your desire for it just be a kink or a fix. I think this community is bigger than just your preferences, however.

Why are you fairly certain?

I can't speak for everyone, though I suspect I'm the average viewer of the [F] filter. For me, it's 100% about breedability. Hormones and surgery can't change what matters. An infertile woman still has the equipment, even if some of it's faulty. No comment on [M], it's not my interest.

I know this isn't what some people want to hear, but that's how sexual attraction works for me, and likely most viewers of the [F] tag. Sorry, but it is what it is.

I'm not interested in neogenitals, either looking at them or interacting with them.

To put it impolitely, what I want from my porn (and the [F] filter) is sexy, breedable females. Any variety of MTF is not that. FTM is that, except maybe after phalloplasty, I don't know the details on that.

I'm not going to claim to have an enlightened dick. It wants what it wants

Another viewer here, same. When I'm looking at porn, I don't care about gender. I only care about sex. [F (trans)] should not be used, because it shows up when I filter by [F]. I get that some people don't mind, but I strongly do not want. I don't care about other tags like [T], as long as I can filter by [F] and not get any of that.