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.
Not being contented with your win can be one of the reasons why you might end up losing more, you have a point on that. The main reason why a lot of people lose after winning is because they chase after more wins and as a result of this they end up throwing their stake and profits away. Gambling is a game of luck and whenever you get lucky it's important that you take advantage of it and stop chasing
If we are realistic about it, it is very unlikely most gamblers would feel satisfied with what they earn after a lucky streak, because none of them step into a casino having a ceiling to their potential winnings. Most of us just want to be lucky enough to become millionaires inna single seat and not having to work ever again, that we could not do that even if we had the luck to score a couple of thousands of dollars in a single crash run, for example.
It is kind of ironic if you think about it, how we all have floors and budgets to what we are willing to lose or are capable to lose, but we don't have the opposite: a maximum amount kept in mind before we withdraw from the casino to our wallets and spend it on whatever we wanted.