I think that even if you are 100% correct, those on the other side will just beat it back with cries of bigotry, and the media are really pushing that angle themselves.
Good. Let them. This is just illustrating what they trans ideology is like.
So I'd rather not give them the ammunition, and concentrate on the disparity in strength etc.
You haven't taken into account that they are currently using most of that ammunition to shoot themselves in the foot.
There is a two-pronged approach to be had here. One is the way that you are suggesting - reasoned debate avoiding emotive words - and the other is the one that many people actively want to use which is that it's out and out cheating.
Let's not pussy foot around, let's call it what it is. Let's shine the spotlight on it and examine it. If we are called bigots for doing so, so be it.
The overwhelming majority are shocked and outraged that Martina Navratilova was called a bigot and transphobic but do the likes of McKinnon stop using those words? Have they apologised. Have they fuck. They even have a list of all the 'transphobic' sportsmen and women who have spoken out.
So don't try to say we can't use a word like cheat.
There is no reason why both approaches can't be used at the same time. Good cop, bad cop is a well known tactic used to get to the truth of the matter.
People do feel outraged that this ruling has been brought in via stealth. And if both sides get a bit hot under the collar, their masks will slip and we will see what is really driving this.