Medical opinions do and will vary, it's why some people insist on second opinions.
Yes, and experts in the UK, Holland, Sweden, and elsewhere, have looked again and changed their opinions on puberty blockers and gender affirming care for children. And sporting bodies and their medical experts have looked at the evidence and excluded transwomen from the female category.
You don't seem too thrilled about them getting 'second opinions' on the evidence and changing their procedures though.
Your own approach, like some others, is to seize upon any argument possible to prevent trans people having access to their own human rights. This is the approach even when one of the arguments directly acts in contradiction with another - something which has been pointed out to you so often.
What human rights do trans people not have? It's not a human right to have access to the other sex's single sex spaces, whether it's in sports or a refuge. Why does your much touted United Nations human right to dignity trump other people's right to the same thing?
If the owner of a venue feels strongly that they don't happen to agree with a hirer, can they not insist on their philosophical beliefs are protected too by denying the hiring?
What you can't do is ask someone to appear then cancel because your staff don't like her. You couldn't do it because they don't like black people or Jews or gays or trans, and you can't do it because her views are gender critical.
It's curious isn't it, that Maya Forstater can have a protected belief, but those with the opposite protected belief are not deemed worthy of the same protection under the law?
Discrimination against people just because you don't like them is illegal. As it should be. Gender ideology beliefs are protected in law. As they should be. You are wrong to say they aren't.
What is being insisted upon here is that those with a gender critical belief must be free to express it wherever they like, but those who don't agree should just shut up, and those caught up in the middle should just be complicit with the wishes of the GC brigade.
No, what is being insisted upon is that you cannot discriminate against someone on the grounds of their beliefs. If the Stand club had booked India Willoughby and then cancelled when their staff said they didn't want to work with a trans person that too would quite rightly be discrimination and against the law.
You seem to want the law and free speech to not apply when you don't like the victim of discrimination. I think it should apply to everyone whether I like them or not.
Funnily enough, the Stand club have also sought a second opinion, a legal one - they've apologised and acknowledged they acted unlawfully.