Greed can make many things of you, but we should stay in control in order to continue to have fun and not harm ourselves in the long run.
Cold head in any situation, win or loss => a good time spent in the foreseeable future.
And I agree - we can't win forever. And we can't have bad days forever too.
It's difficult to control greed and the desire to win, especially when you haven't won for a long time.
What matters most about a veteran player's experience is that they already have experience dealing with an emotional outburst just thinking that it will cost them money they shouldn't lose is enough to stop them, because a veteran player has been through many situations that have made them mature.
But we're human, we make mistakes too, It's very easy to make mistakes while playing you just need to have self-control to avoid falling into greed.