So what would you have this person do, that made it okay for everybody? (Let's assume that currently, they are getting bullied when they use the male toilet).
I can see you are maybe new to this debate?
Here's how this conversation would go, a quick précis.
You suggest they are bullied in the men's toilets. Firstly there is no evidence for it, but the question would be by whom? You would say men. And the assumption would be because course men are violent, right? And they're going to beat up a bloke in a dress.
And yet that logic, that men are violent, disappears when it's women who are going to be subjected to men in their toilets.
Women have to suck it up.
Do you see the inherent sexism there?
And the assumption that it is women who will suck it up, by calling it compassion, is even more sexist.