When one looks at someone who is working hard and someone who is not, you can always tell by how well they have been taught.
When one plays the piano, it should look like they are almost doing nothing, and yet it’s amazing what sounds they are creating.
Check out these two links to see the difference. They are both performing “The Flight of the Bumble Bee by Rimsky-Korsakov
A good performance https://www.youtube.com/watch?v=0h9siME08qo
An amazing performance https://www.youtube.com/watch?v=0h9siME08qo
Which way would you choose to perform?