" The CEO of a large, global bank once told me: "It is very easy for someone in my position to be very busy all the time. There is always another meeting you really have to attend, and you can fly somewhere else pretty much every other day. However, I feel that that is not what I am paid to do. It is my job to carefully think about our strategy."

And this reminds me of Aditya Puri who is famously off mobile phones, does not sit in office beyond 6 pm, does not take calls at home, and keeps a squeaky clean desk at office. 

https://hbr.org/2015/09/5-strategy-questions-every-leader-should-make-time-for