This is about kids feeling successful at sports even when they don't win. You seem to think there is some connection to work but no one has made this connection.
"Daddy I had fun at soccer today?"
"Did you win?"
"I ran really fast and I kicked the ball to Patty."
"Did you win?"
"I had fun."
"But did you win?"
"So you were the loser then, weren't you."
"But daddy, I did my best and I had fun."
"This doesn't mean you weren't the loser does it."
That's what we are talking about, right? Come on, I want my kids to try their best and to have fun. And even when what they are doing isn't that important, I want them to have perspective, they don't need to get all worried about things that aren't that important to them.
Work has nothing to do with sports. I work really hard at my profession, and I enjoy it. I do it because that is who I am; not because there is any kind of score. I am fortunate to feel the respect of the people I work with and I like that people around me feel my respect and appreciation.
My sport is poker. I work really hard to get better at poker (reading books, studying, memorizing odds and running simulations as well as playing). Yet when I am at a poker table I don't focus on winning. When I am playing poker I am not trying to win.
Any good poker player focuses on playing optimally (i.e. doing your best) knowing that even playing perfectly you are going to lose a good proportion of the time. As soon as you start caring about winning it starts to get emotional which hurts your ability to play good poker.
The lesson is do your best and don't worry about the result. I think this is a good way to live your life.