He said: "You cannot feel sorry for players who are frustrated. We are in a job where you have to be men. I cannot understand this. When you are a professional football player competition is part of your job. You cannot be at one of the biggest clubs in the world, like ours, and not expect competition.
"You know that before you play football. And, when you sign a contract, no one puts a gun to your head. It is a job for strong people and those who remain strong will always do well. We are not a kindergarten. Why should I give explanations to everyone who is unhappy? It is a joke.
"Tell me one club in the world, of our size, who gives a chance to the young players like us? Nobody. At our club, players are in paradise. Often, you have to wait until 26 or 27 to get a chance at a big club."
Diarra, 22, has only made four starts since arriving from Stamford Bridge for £2million and Wenger admits there is a chance he could be sold next month.