For the ‘but sport has to be fair’ people, stop. Sport will never be fair, there are always people with better genetics, and with better access to training and equipment and the time to devote to developing their potential, bla bla bla.
The people trying to lawyer about who is or isn’t a woman here aren’t here to make sport fair, they’re using the fact you’d like sport to be fair as a way to get you to support their demand to be able to reduce sport into a thing they can pick winners with by disqualifying people on arbitrary standards they get to invent.
I mean, the people that have been insisting ‘you’re a woman if you were born with those parts’ are now insisting ‘you’re not a woman if I feel like you’re not a woman’. Your takeaway here is that the pretexts will continue to change in order to get or keep your support, the underlying thrust is they want to discriminate against people that don’t fit in to their ideas of what being a woman should mean.