It's not. You will get up early, that's true. Then you'll spend until noon in zombie mode, then you'll blow through the afternoon, all stressed, trying to desperately catch up with your work as to not have to stay late. Then the partner/family stuff, and then with the evening, comes the big problem: you now need those late-night hours even more, to unwind, to sort your thoughts out. However, it also feels bad to not go asleep with your partner together. But then, you're not really in the mood for anything and going to sleep early feels like throwing away the best part of the day.

In the famous words of Admiral Ackbar, it's a trap. Ask me how I know.

(Also, Admiral Ackbar doesn't know a thing about traps. It's not really a trap until you have small children in the mix, randomly disrupting any kind of rhythm or schedule you cling to in order to cope.)