I have heard so many sayings around working hard and working smart. Those sayings seem to suggest that you can only do one or the other, never both. In my view we should do both.
Take for instance the guys who built telephones. They were working smart. Instead of sending someone for two days to deliver a simple message, you can now just make a phone call and your message is home. Working hard is when the messenger is expected to deliver the message in two days and the feedback in another day or so.