Poker is cool. In one evening, you can reach the height of happiness or unhappiness, all very quickly. It's not bad or good cards that matter, it's important to be able to play bad cards. What matters is not what cards you actually have, but what your opponent thinks they are.
Poker is like boxing, the only difference is that a boxing match lasts an hour, while a poker game can last for a day. The player is a lone wolf who is addicted to the game. For him, nothing exists outside the table, he is only concerned with how to survive in the game. All the problems and questions that a person may have are supplanted by the game. This is an escape from reality.