OP is clearly referencing the sum of all people who listen to a piano in a song. Not the "life-long, dedicated pianist"'s of the world. And to further that poin

OP is clearly referencing the sum of all people who listen to a piano in a song. Not the "life-long, dedicated pianist"'s of the world. And to further that point, lots and lots of folks who play in touring bands do not haul a piano with them. They're usually using something like a Nord Stage.