By limiting your losses to 30 big bets, you are effectively...

By limiting your losses to 30 big bets, you are effectively minimizing the time you spend playing with a poor table image, playing passively, or steaming at the table and maximizing the amount of time you spend playing your A-game. If you don't go beyond 30 big bets, you won't dump off large sums when you are playing poorly or are in a bad game. Loss limiting acts as an objective stop-gap.