I don't have to prove anything but I can take any losses that I'm aware of gambling with.
There are countries already that have regulated online gambling and some decided to ban and won't operate through it. I think the reason for others to prohibit it so the land-based casinos won't have any competition.
But if they allow so, they might be looking into crypto casinos too.
Casinos should be the one to regulate about gamblers losses but unfortunately, there is such a thing as privacy concern and protecting data of their customers, it's like a bank where they need to protect their clients because these casinos rely heavily on their high rollers and high rollers do not want to public what they spend in gambling.
With this kind of proposal, the casino needs to reveals that information once the government ask them.
Though I do agree that it should be the house that supposedly handled this case and start providing such treatments to avoid heavily addictions.