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Yeah, Online gambling is the nightmare of those user that has no self control even on physical casino. I believe it will be difficult to discipline yourself about budget you will use on gambling most importantly if you are living on your own since no one can help you while someone in the influence of gambling addiction usually has the tendency of no self control.
Locking your funds or moving on a wallet that you have temporarily no access is the best way to avoid over spending. This is assuming worst case scenario that you will lose a lot and has the urge to play more.
I agree with you that even a regular gambler when he has money in his savings he is always interested in trying to gamble again but he will really stop if the money runs out or in the way you said move the money to another place and lock it up very tightly so that he can't use the money to gamble anymore or in other ways entrust the money to a trusted family member so when he wants to gamble he definitely has to ask that family member but he thinks it will definitely be difficult to ask for the money because he will definitely be asked what the money is for .
I also have the opinion that don't keep money in any online wallet because there are always attractive gambling advertisements so someone can very easily deposit money if they hold their money in an online wallet as I experienced myself when I decided not to gamble and waited 1 week to gamble again but when I see an advertisement that makes me interested I register and deposit a small amount and it happens continuously and this is all because the ease of online gambling today provides convenience for gamblers but has a negative impact in the long run.