But there's no difference between this post and a post of, for example, Astolfo or any other "draw a girl call it a boy"-type otoko no ko character sucking a dick. Why should one get the tag and the other not? Someone searching for it would want to see both and someone who doesn't want to see one wouldn't want to see the other either.
The transgender discussion is barely tangential here, as there's no real indication that this is post-op Bridget save for pronouns that are given to pretty much any instance of the character no matter if the dick's out or not. Let's be real here, this is the same artist that made post #5879649.