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That`s why they are called "good players" 
They can loose sometimes if the opponent skill low, they can loose if their skill are about equal but mostly they win.
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Yeah but ... I mean, that's what I'm saying always too, but according to the opinion of the vast majority of poker players, including professionals, poker is absolutely a game of skill in the long run. A good poker player can lose in a short term to a very weak one, but after 20-30 games(tournaments) he/she will surely be the winner altogether. Idk, are there exceptions? Can you name some? They can loose sometimes if the opponent skill low, they can loose if their skill are about equal but mostly they win.Agreed. So, no exceptions then. Good players always win in the long run. The only problem here for pro poker players is that they can encounter equally good players in high level tournaments. And they do, actually, all the time. And when great players meet each other at the table, it's not their skill, but rather it's luck what affects the outcome the most. Knowing this fact, an amazing poker player Liv Boeree quit professional poker in 2019, after winning around $4 million in live tournaments.