Why Art? Why Bother?

I often wonder what difference 'this' will make. 'This' being whatever I happen to be engaged in, creating art, doing hair, cooking diner -- what difference will this make in the world, in the bigger picture. I struggle with this as an artist, I struggled with it in my former career as a cosmetologist.
I have found few answers.
Then, wile doing hand work (not my favorite, but the time I catch up on viewing things like TED.com videos) I came across this great talk by JR.

He talks about just that -- making a difference in the world WITH ART! Inspiring and motivating. Give it a look!