It doesn't take less of my time, because I can do other things while I wait for the confirmation. In fact, inducing me to sit and stare at a fake progress bar

It doesn't take less of my time, because I can do other things while I wait for the confirmation. In fact, inducing me to sit and stare at a fake progress bar probably takes more of my time. And in any case, it saves me having to repeat my order to someone who doesn't speak great English, etc.