If we get our money back everytime we lost , what is the point of gambling?
We honestly believe , even if your story is true or not , if you lost your money gambling , you lost it end of story.
I'm not sure you understand the situation. He (or his 'friend') gambled and lost coins that he hadn't deposited. Coins that nobody had deposited. They weren't his coins (or his 'friend's') to play with, nor his to lose. So by rolling back those bets, I was rolling back bets that should never have been allowed to happen.
It's a different situation from when somebody deposits and loses, since those bets are 'real'. The coins gambled there correspond to real coins in the site's wallet. The coins 'celeste' gambled and lost didn't correspond to any coins in the site's wallet at all.