Anyone can say they are Trans to get out of a Rape accusation or be given a lower sentence or sent to a different prison etc... and unfortunately all Trans people get lumped into one giant group. It's like saying all men are sexist women hating bigots, it isn't true.
Yes. That is the concern. That is what we are fighting for, protesting about, signing petitions, writing to our elected representatives.
With self id, any male can identify into single sex spaces. Predatory males, however they identify, will take advantage of that. It's stunningly naive to think they won't.
That's not saying all men are predatory. Or all transwomen are predatory. That's just hyperbole which is trotted out to silence the debate.
It is saying that those who are will take advantage of loopholes and the general silencing effect to cause harm. It is already happening. Risk assessing and safe guards which were in place to stop such things happening have been blasted away under an ideology which brooks no disagreement.