now it's like dominoes.
Quite. The fear (and it's important to be aware of fear of what and who carried out said punitive actions) to say what was believed and known to be right has played a huge, huge part in this.
And once it is established that male people cannot be counted as female in sports, then it's established that there are necessarily, limits and boundaries to TW's choices and freedoms of access to female spaces, resources and activities and that sex remains a dividing line necessary to the equality, access and inclusion of females and the meeting of their sex specific needs.
Regardless of how cross this makes male people, who would prefer to not have to respect them. Which illustrates in a nutshell why in part female humans continue to need such resources and spaces and why the gatekeeping is now going to have to be firmly beefed up to fit modern times. Because the basic good will of permitting and respecting their spaces/needs/inclusion/equality etc has been trampled out of the way by the political TQ+ lobby.
This will end (eventually) in legal protections for females. And good.