Stealing for the sake of gambling is the height of it and I have never seen or heard of that story before. Not with the uncontrollable ones I know, they always have their limits, and when there are no friends and families willing to give them money anymore and they do not have anywhere to borrow from, I believe they often accept that situation as their last and do not resort to stealing. In my thought, I believe the person who went to the extent of stealing to gamble is a criminal on his own, I will never take the excuse that it is the addiction per se that led him into it but the lack of contention and for his desperation for "money."
You'll be shocked at what gambling addiction could make some individuals do, I've heard a case of a guy who tried to steal another gamblers wallet in a bet shop and when he was caught his excuse was that he used his tuition fee to gamble and lost everything so stealing was the only option he could think of to try again and see if he could recover his lost funds, funny right? That's how foolish some individuals could be when they become addicted.
Well you might be right though because someone that's not a thief won't think of that as the first step to take in recovering their funds and maybe the guy who tried to steal that wallet was trying to use his gambling addiction as an excuse to get pardoned but unfortunately for him a crime is a crime and you'll get punished for it no matter the excuse. The best thing to do would've been walking out of that premises and go seek other better alternatives to recover his tuition fees.
I like your concluding part, it at least levelled the whole discussion. I know that there are thieves and people who do unspeakable things for the money, and if such people are gambling, I believe that they can naturally think towards that angle since they are bad people. This is the school of thought I picked my reply from and the only reasonable angle I can think of people that bad people will always be bad and can go to any length to achieve their badness.
If such people are now gamblers, some people would say they acted because of the addiction/desperation of gambling, but no, they acted in such a manner simply because they are bad and shameless and nothing more. This is all about needing money, what you use the money to do does not matter, what matters is how you get the money, is it good or bad? That's what defines you. If the source of money is bad, then you naturally want it in a bad way, that's why you went for that choice and not the gambling that makes such a person do that. You can imagine the example you narrated, that guy was desperate already, and that's why he resorted to stealing someone's wallet.
That's so senseless because no one forces him to gamble all his school fees, the greed of needing more money, or the frustration of not having enough pushed him to that. Something must have pushed every thief also. This may not even be an addiction case but a mere case of a victim of gambling who later became desperate. No matter why, anyone who goes to the length of stealing to gamble should be rehabilitated immediately. If not, such is near his true physical madness because such is already insane.