quitting gambling is does not require patience so I doubt it is what the post wants to address. Also patience does not prevent big losses because it is not part of risk management. What I think the post is addressing is a situation where some gamblers expect to win all the money in the world in single day or even single round. This eagerness to win is what lead to different kinds of bad gambling habits and mistakes. When a gambler is willing to commit to time, Following the gambling process slowly and not rush things, it is likely that he will succeed. Some people even quit gambling after few losses when their time have not come; this is something that patience can also address.
A gambler doesn't need patience in all situations, there are some situations that a gambler need patience while in other situations the gamblers needs to stop being patience due to, if he continues to have patience he might lose all the money that he has and he might become broke. Many gamblers have lost all their money as they were gambling continuously while they're losing and it could be they were having patience waiting for the day that it'll become their turn to win but it didn't come.
Having patience can't be a risk management habit when gambling, risk management habits has to be habits that'll prevent you from not losing too much as you can't say you won't lose. When gambling, you're going to lose some bet regardless of how professional you're at gambling. Gambling doesn't have a strategy that you can use and be sure that you're going to win anytime that you want to gamble.
Patience can only help with the management of making mistakes, but does not avert the rate at which we can loose when gambling, we need patience in some aspect as it has already been told, but this does not justify if we are going to loose or not, we need to make every necessary efforts in the game we are playing so that we can have the satisfaction in it, also when we are gambling, some games will require us to be quick in making decision by taking advantage on opportunity and here, it does not applies that we use patience when the need is a matter of urgency.
