Because, from what I understand, transfemales want to be treated as females and transmales as males where as the opposition doesn't want those "males" in women clothes to enter women bathrooms in fear of them praying on women.How is it not satisfying for both sides?
Unisex bathrooms - which have been around for quite some time - adress neither of those arguments and thuse are not really solution or even compromise for either side. It ignores the premise of the argument. Which is the question, how transwomen and transmen should be treated. It comes down to what you personaly believe. That a transwomen is just like a woman and should be seen and treated as such in society. Or if you feel that this is not the case and a transwomen is always a male and should be hence treated as such. Bathrooms are just more or less a talking point. But the bathrooms are not the reason for the issue. It's just an area that's affected by it.
Again I am not arguing for one side or the other here. I am just saying that what you offered doesn't seem to me like a compromise that any side could ever live with as it simply ignores completely what they are arguing about at the core.