I think that your “preference” is based on very sloppy thinking rooted in ambient transphobia. I think you are also confusing a desire for precision of thought with being pedantic.
I think you’re trying to imply that preferences are neutral facts. I think you should consider how you’d react to someone saying “I am only attracted to white women” or “I am only attracted to 18 y/o women”. Do you think their preference is a neutral fact or an expression of something?
Oh, also, expression of “preference” is different than having a preference. Ask why you felt the need to say it in this thread.