Well, self discipline can also be learned if you're following someone who in his long time of experience in gambling has a self discipline culture as he gambles. People can be influencial on the lives of others, so a newbie gambler who may not have that self discipline already existing in them can learn it from whoever is guiding them about how to go on with gambling. Hence we can say Self-discipline is a two-way thing.
Many have failed in managing their own personal selves and there is no how they could achieve the best of gambling without going through the normal ethics in gambling, being discipline goes by far in this, because a gambler who is found in this act will be able to apply self control to his behaviours and things will eventually go well with him, but the challenge now is when you discover the situation whereby gamblers are in an expectation of what they have not contributed to see such happened to them, the more the need for a responsible gambling and being disciplined.
It's either as a gambler you're ready to uncompromising with being discipline in order that you dont have issues with gambling addiction struggles or you act charlatan about it and get to experience the bad sides of it which does raises the question about whether or not gambling has a good side. A question which I will always say yes to.