Why are women athletes NOT objecting to the takeover of their sport?

All the above reasons are absolutely correct. What I think I am struggling to articulate is how is it that we are sewing banners and marching to commemorate the granting of the franchise for some women (very important I know) including transwomen in this (one of the participants mentioned how important LGBT rights were in this!), when women's sport, women's spaces and recognition of women's achievement etc is all at risk.

Thank you to Man Friday, WPUK and all the others who are working to prevent self id being enacted, but as women are 51% of the population, how has it come to this? A bit of a rhetorical question. I suppose the real question is what can we do about it all?

Possibly because at the top level it hasn't impacted them yet. Also most sportspeople are very cautious about what they talk about these days with one eye on anything that can affect their image and marketability. Look at Beckham. For all his fame, how many truly controversial subjects has he ever got involved in?

I looked into this during the Commonwealth Games and the issue of the weightlifter and found that other countries' weightlifting federations and female weightlifters were objecting. I think/hope that we are simply not aware of what is going on behind the scenes. If it is so plain to us that men competing as women is wrong, how much more amplified must it be to the athletes who are (or could potentially be) affected?

I’m sure Lynsey Sharp (Scottish middle distance runner) made some twitter comments and got completely crucified for it unsurprisingly. She was up against 2 or 3 athletes thought to be intersex after IAAF decided to drop the requirement for testosterone to be under a certain level. Not quite the same as transgender but certainly intersex athletes have a clear advantage here (through no fault of their own)

I was talking to the mother of a young, up and coming sportswoman this week about this subject. She said ‘oh it’s just a fad, There are lots of trans in her school, but they aren’t interested in sport.’ Then I got the whole, ‘you didn’t strike me as being like that and anyway DD is very inclusive’
Told her to look on MN, awaiting to see outcome if she did, and suggested her daughter may be less inclusive if her place on the girls team is taken by a boy. To be fair this particular sport is very male biased, but she hadn’t got a clue that it could even happen.

Fear of reprisals/being labelled/banned
Conditioning to 'shut up and play nice'

They are sponsored, by prvate individuals, companies and sport bodies and national agencies, like Sport England/Scotland etc.

If they speak up as individuals they will be pilloried. They have to speak up en masse, preferably with a male spokesperson (and yes, I know how that sounds, but it is still the sporting reality, sadly). I know that women's rugby is due a lot of a shout, shortly. There have been a few nasty injuries at both grass roots and junior elite levels.

When your livelihood depends on you being 'saleable' it is hard to step out of line - for men and women in sport!

Look at the Transgender Trend crowdfunder, the vast majority of donations are anonymous. That isn't because people are ashamed of donating they are scared of the repercussions. It's the same principle with sport, women are afraid to speak out.

Because they've been bullied and gaslighted into silence.

Why is it only up to female athletes?
Male athletes are often paid more than women in the same sport and more easily forgiven if they say something controversial/unacceptable.
How can male sport make itself more inclusive?

For the same reason that so many women are terrified of speaking out about women's identity and legal rights being removed. TRAs will try to get them sacked, will call them transphobes, may try to assault them, will harass them online, may put on masks and intimidate them, will try to stop them talking online and meeting to discuss concerns ... and the list goes on.
Sportswomen are mainly young women and the their whole sporting careers could be ended.
Until and unless politicians are prepared to stand up to the trans monolith and stop them harassing and bullying women, nothing will change.

Because even in numbers they'll be labelled transphobic and be dropped from their sponsorships, dropped from invitation events and so on. They won't be able to afford to continue in the sport and that will be that.

THIS

Ah yes, the procession which is open to anyone who identifies as a woman

Just a guess but I imagine if women were still disenfranchised, identifying as one would be rather less popular.

Because even in numbers they'll be labelled transphobic and be dropped from their sponsorships, dropped from invitation events and so on. They won't be able to afford to continue in the sport and that will be that.

Excellent question, especially with the background of the procession re women's suffrage going on today.