“Doesn’t this apply to every instrument?” Yes and no. A piano player uses both hands to play simultaneously while traversing 88 keys. The ability to play 10 notes at a time, and looking or thinking ahead of what’s next, combined with the foot pedal, indicates the mental fortitude needed to navigate the complexity. In turn, pianists are required to develop a unique brain pattern, different to musicians of other instruments with equal skill and reaction in both hands. This makes them a maestro in terms of skills and imposition.
For an average person, their brain’s central sulcus is either more to the right or to the left side which determines which hand is more dominant. However, pianists have a notably more symmetrical central sulcus than others, even if they were born right or left handed. It is as if their brains didn’t register it. This shows that we are able to strengthen the “weaker” side to be as strong as our dominant brain side simply by playing piano. This shows a better way to add a new skill while going hard at piano practices
Brain regions involved in creative playing are active when a pianist plays an improvisational piece. This means playing whatever comes to mind on a piano may in fact help you be creative in other aspects of your life as it triggers the part of our brains which lead to those “Eureka!” moments.
Source: Online Pianist