Sitting and thinking may be a better use of your time than filling every minute up with meetings.
Busyness is not a proxy of your seriousness or effectiveness. It takes time to think deeply, especially on complex and complicated matters.
The busier a person’s schedule, the less time that person has to adjudicate carefully and in a considered way on any single matter.
This probably applies to scheduling at the daily, weekly, and maybe also yearly level.
Every now and again, it’s important to take out some quiet time, if you are one who likes to think deeply about things.