Well it is not greed, we have to learn from our mistakes and don't repeat it. Winnings streaks are not there everyday while loss streaks almost happen each week. Recovering losses from previous streaks shouldn't be done in single session, IMHO.
Well, we do learn from our mistakes but when it comes to greed, everyone can repeat the same mistakes and it can even be worse than before. We can never get consecutive wins every day or every time we play because it depends on our luck and we already know that. But sadly, we are still trying to get more wins and if we lose, we still want to recover from that loss instead of pausing to ease the tension.