I really just don't understand - it's like the governmrnt one day deciding the sky is now green and will be referred to as green from now on and everyone must say it's green.
Yes, only that pretending the sky is green wouldn't hurt anyone.
The Catholic Church has for centuries pretended that a communion wafer literally becomes the body of Christ, but that worked because everyone has always treated it as ... a wafer. Vegetarians do not refuse to eat it, and the government has not objected to the cannibalism this would constitute if anyone took it seriously.
The problem with this pretending that men can be women shit is that we are not only expected to nod and agree, but forced to treat those men like we would treat real, actual women. And that has very, very, very bad consequences.