These theorists say to keep playing if you're losing, perhaps even badly, if you're still convinced you have an edge on the others in the game.
Life is one long session, after all.
If the ONLY reason we all played poker was money, I might be willing to go along with this line of thinking. But for the vast majority of players, poker is about more than just money. Further, even if money is the only reason you play, there are still some reasons why quitting a good game can make sense. Players keep drawing out on you with inferior hands, your own flush and straight draws just never get there-every poker player goes through periods like this, and to say that they are no fun is an understatement. Unless you have extraordinarily unusual emotional control, such a streak of running bad can start to affect your play and make it more likely that you will continue to lose.