Swing And A Miss?

I saw this ad for optimism. It's part of a series of inspirational ads from the Foundation For A Better Life:



I suppose optimism is a good thing, but is there a problem today with kids being too pessmistic? I've heard it's more that kids think too highly of their accomplishments. And while people should look at the bright side, there's a fine line between seeing the glass half full and being delusional.