What Piffle seems to be saying is that, regardless of the content of your talk and nature of its relevance to women, you include transwomen (males) in what you say.
So Piffle is saying, apparently, that if you're discussing pregnancy, or periods, or FGM etc., you should also present this as applicable to males, as this is the ethical thing to do.
The only alternative I can see is that Piffle is suggesting that, if your talk is about any of the above - even if it may be of benefit to trans men (females) - you perhaps don't give the talk at all.
Am I right, @Pifflepafflewifflewaffle? I find it hard to understand the below in any other way:
theyve made a statement about who they include when they talk about women, I would suggest (EDI professional) that you follow that very clear cue (you don’t need to refer to it explicitly) or opt out if it goes against your beliefs or values
if you, as previous posters have suggested, use your platform to share your views on whether trans women are women, for example, the organisers are likely to have an issue with it, because they’ve made their position clear