Winning is not the problem rather greediness is the main culprit that makes you pursue more to bet when you are already in profit.
I personally don’t view winning with negativity despite the example involved since I knew that it’s not the winning but greed. Losing or winning greed is the common factor why people lose in gambling.
You are correct, winning is not the problem but greed. This is common among inexperienced gamblers when they hit a big win over small effort which means they just got lucky. They will think it will always be that easy every time hence, they go again, increase the amount and make studies and end up given back their winning to the casinos. Winning are supposed to be withdrawn and used for something remarkable so you will appreciate gambling for making you achieve something tangible.