I think it is.It's all very well arguing over what a woman is, or if somebody doesn't know what a woman is, but that really is not what this is about.
Some campaigners maintain that TWAW, and that any person who says "I am a woman" is therefore entitled to all the protections, rights and qualifications of a woman.The question is, should somebody that has had the genetic and hormonal advantages of being a man during their formative athletic years be allowed to compete as a woman, knowing that they have a biological advantage resulting from the years, or in this case, decades, of being a man.
If this is so, any such person is a woman and is therefore entitled to compete as such. Lifestyle, body mass, hormones and genitals are irrelevant.
If they are a woman, they are also entitled to strip naked in womens changing rooms and demand bikini-waxing in a women-only parlour or join a women-only club.
This argument is only tenable if you maintain that there is in reality no such thing as a woman.