...and you're working or other obligations...or you have nearby anchorages. It's all about what works for you.
Besides, there's a lot more fun that occurs after engine shutdown that never shows on the hour meter.
The boat I had before, was 18 years old, and had 700 hours on the motor, and 2700 hours on the generator when I bought it. It spent a lot more time anchored out than it did moving.