One area where poker differs significantly from other sports is the degree to which the competitors are evenly matched, especially among professionals.
Soccer teams compete with similar level teams determined by leagues, sprinters only race against those with high enough qualifying times, and boxers are matched against fighters in their weight class and of a similar level.
That’s generally not the case in poker, where there is a heavy emphasis on seeking out competition that’s significantly weaker.
It is routine for a world champion to share a table with a complete amateur. In fact the difference in class between a ‘shark’ and a ‘fish’ can sometimes be equivalent to Tiger Woods playing against a 20 handicap.
Sport thrives on close competition to get spectators interested in watching. Poker players, however, make their money by finding huge edges. The problem is that if you’re only looking for easy money eventually that can harm your progress and thus the size of the edge you have in the game.