You can say transwomen are men. HQ want to help the discussion flow, and that's part of the discussion.
When you are referring to specific people, it's a lot trickier. You can still say male bodied, as it's the pivotal point. But you can't misgender with pronouns.
I'm not sure if you can say so and so is male born. I think you can if it is absolutely pertinent to your points, and the rest of the post wasn't gratuitously manning people up.
I think the point they're making is knowing these people are male/men is part of the entire discussion, and so has to be included. But not for specific people, and not gratuitously as a ner ner.