To be sincere with you is never easy to use the money someone won from gambling. Some do invest in something productive but some only think they can use that same money to win a bigger amount in gambling (by going back to gamble). I see such people as those who don't have any plans for themselves other than gambling 24/7. It only takes the grace of God for a gambler to think positive if not is hard. This is the same reason why many would agree that gambling is not good because nothing good comes out of it even the money won no matter how large the amount is they can't use it to do anything good but I'll always stand against that, is only those who use their head that make good use of the money won in gambling.
The only time you won’t be able to use the money you won from gambling properly is when you don’t know how to handle money naturally.
If you’re the business minded person, once that money comes into your hand you don’t immediately rush to invest (if you do so you’ll only end up with nothing at the end an that business will crumble due to lack of planning) - the first thing you’ll do is proper survey and analyse how and when you plan to start the business look at the area if it’s a place that will be able to sell that thing you intend to do before you start the business.
If you just jump into a business because a man you know is also doing it and now has multiple cars you’ll end back in your house.
I agree with you, honestly lack of planning doesn't help, that's why whenever any kind of money comes in weather is by gambling or not is best to allow the money to be for sometime because at that moment multiple ideas will be flowing through your mind and your won't know the one to settle for, that's why you also need good friends to put you in place in this kind of situation. The advise you get will be the best to help grow what ever business idea you want to engage in. But to top it all I believe there's a spirit that comes with gambling money that makes people fail on how to manage the money.