Einstein moved his hand back and forth on the blackboard. Mozar moved his fingers back and forth on his piano. Van Gogh moved his hand back and forth on his can

Einstein moved his hand back and forth on the blackboard. Mozar moved his fingers back and forth on his piano. Van Gogh moved his hand back and forth on his canvas. But well, it is just a hand. So you can clearly see that the problem is in the value you are adding to something, even if it is intellectual, manual or artistic. How much value can we appreciate with the BART for its current cost?