I think Greed is only the big mistake in gambling.
Well greed is the most known thing that let people make mistakes because they get addicted to gambling because of that.
Yes totally agree with you.
yes, sinking into greed when gambling, is a fatal mistake. it can affect the long term. could have it, makes you have a lot of debt, because they want to win the stakes in gambling with a great gift.
trying to chase loses and when you already abstain it greed came up and make you try even more to aim for another or additional winnings, so instead of covering your loses when greed showed you are not in control anymore and it was a great mistake for you after you lose everything in your pocket better know your limitation to avoid this big mistake again.