It purely insane for a gambler to be happy while loosing, except the player is using another person stolen money to gamble. While gambling has remain a game of luck, it's been proven that many fail bets makes a gambler never feel disappointed anymore but get used to loosing, but that doesn't mean they are happy or they enjoy loosing. Nah
He's gone crazy if you see someone who is happy when he loses and sad when he wins.
Unhappy when he loses and happy if he wins—that's a normal reaction for most of us. You are gone crazy if you did it in the opposite way. Everything in the casino are based on luck. It wasn't build to make you a living; it was built for entertainment purposes. That is why they are just suggesting don't put too much emotion into gambling because you might end up crazy when you are happy when you lose.
There are many different people who gamble. Those who are seeking money are way happier compared to people who gamble just for fun; they treat gambling as a source of happiness, and even when they lose, they are still happy.