Uploading such file "responsible gambler certificate" before playing on gambling platforms won't help problematic gamblers to gamble because "government is trying to protect the users' wealth". Certs can be forged, faked, etc.
Exactly. What's the point of having this certificate if it can be fake of someone who's eager to gamble despite of not being a responsible gambler when already playing. Moreover if you're a casino owner, do you want to limit your gamblers because he's playing excessively? BTW Casino is a business.
There is no cure for addiction, remember that, it's someone's sole responsibility to do avoid, stop and be responsible in anything they should do even not in gambling, as long it is considered as addiction.
There's a cure but it will start by helping ourselves. So it depends on us if we're a responsible person to control ourselves in everything we do.