You don't have to do it in the United States, it's just that your coworkers will. In reality it has never made a difference for me. I can quickly scan my email

You don't have to do it in the United States, it's just that your coworkers will. In reality it has never made a difference for me. I can quickly scan my email inbox and if anything is urgent and important it's known that you should either call or speak to me in person.