When people begin to understand just how many male people derive intrinsic benefit, that has nothing to do with their own safety, from being in a female single sex space it starts to come into focus. And this for all male people, over the age of about 8 years old, regardless of having a gender identity or not.
For some male people just knowing that they are in that space and them being there is likely to cause some female people to be uncomfortable or even distressed is the benefit. This an act of intimidation by that male person. And they are the ones who post photos and videos of themselves in those spaces on line. The act of posting them just continues the intimidation of that action.
For some male people, the act of being in those spaces is a sexually attractive opportunity. Examples of these are the male people who self publish themselves masturbating in the female single sex spaces. Often with toilet noises being made by female people and children being features. There was a thread of twitter videos that is now lost, but it was twitter videos self published by these male people. It cannot be claimed that this is not happening.
There are many reasons for male people to enter female single sex spaces. The relevance of discussing it has a few aspects. One is that one group has now forced a loop hole that has significantly reduced safeguarding around this.
There continues to be this disconnect in logic, ignoring all the evidence, that a group of male people should be considered safe to include at all while keeping all other male people excluded. Plus of course, it is not just about safety for female people, it is about the need for privacy from all male people as well.
If male people have successfully convinced policy makers that a group of them should have access while still excluding others, it means that female people have less confidence in making appropriate and safe decisions for themselves. When there is signs up in female toilets educating female people that just because someone looks like they shouldn't be there that they should be kind and not react negatively at all.
There have even been signs and campaigns that are designed to stop female people showing what is considered micro aggressions that cause hurt to male people. So, if female people are being shamed for leaving single sex spaces when faced with any male person over the age of 8 years old being there, there is the issue.
This causes female people to be unsure as to what they should or should not do. This increases the potential for them to be directly or indirectly harmed, which is a harm in and of itself.
A male person who presents as a male person who enters a female single sex space causes a particular reaction. While we are told that one entering a female single sex space that might be transgender has to be treated as another female person. When they are not. And when there is no evidence at all that a male person at any stage of transition, or with any transgender identity is less of a risk than any other male. The policies are contradicting the evidence and contradicting the very reason for sex segregated spaces in the first place.
What's the gain in being a transwoman to do it?
The gain is knowing that due to the current media campaigns and education efforts that female people are less likely to feel that they can react as they instinctively need to.
The gain is knowing that some people in society will support them being there even though they know that it might cause a female person in that space to be distressed.
The gain is knowing that they can attempt to argue that they should be in that space. There are so many 'gains'. I have yet to discover what any female person 'gains' from a male person accessing a single sex provision.