Discipline, risk management and other things will be important for any gambler. They can not just hope to win the games but they should take care of themselves to avoid a big loss. They have control over themselves so they don't spend more money on gambling because they can see the chance of losses will be there.
There is a lot of talk about discipline but you have to have a clear idea of when you are going to play what you should do in any case where you could lose control, you have to have a backup plan in case your money runs out or you spend more than normal, it is Advisable to have control of how much time and how much money you have to spend, that is the first basis for having good discipline in the game, losing large sums of money is what you should avoid.
Yes discipline is very important for any gambler so it is important to control yourself and not rely solely on luck having a plan for what to do when you run out of money or overspend will save you from financial disaster. Also no one can guarantee a win in gambling so in addition to discipline it is necessary to be aware of a gambler's strategies and limitations to avoid losing large sums of money this will save you from overspending and addiction.