Just went to a tea shop, the FM Radio played about doing smart work instead of hard work.

And I heard this statement multiple times. I think that is not a valid statement to me unless I'm missing something.

Every smartness that comes in you is the hours and days you put your effort in to mastery

IOW, smart work is the asset of hard work.

To put in another way, It is through the hardship, the time gives you the gift of experience which is the foundation for smart work.