If you wake up a little early some morning, just go back to bed. Otherwise, you'll just be late for work. Because, you will have the delusion that you've gained more time by getting up early. Such thinking might cause you to have an extra cup of coffee or, worse, exercise. You might get the notion that you might get something done. Something extra.
But this idea is false. You will spend the rest of the morning just catching up from thinking about what extra things could be done, altering your usual routine, and then trying to figure out just where all that time went.
Extra cup of coffee? That might be worth getting out of bed early. Maybe. But you're still going to be late for work.
That's what the snooze button is for.