Self control will let you to enjoy your winning amount, and if you also have that investors mindsets after winning huge amount of money, instead of bringing it back to casino or any types of gambling best to use it for investment, establish your own business using your winning money or invest that amount to any ideal investment that you have same interest with, from that point of view, chasing your loses might be by far and instead of risking more money you might be able to make some and enjoy.
What you said is correct but not all gamblers is gambling to gain capital for business. They choose to gamble because is the easiest way to gain money short term and to have fun at the same time. They will not resort to gamble if their main purpose is to have capital for business since they can start business right away using their funds from gambling if they really want that.
Most gamblers that win huge profit tends to gamble it all since they dedicate that money for gambling purposes including the profit. Personally, I have different funds for investments and consider all my gambling funds including profit to gambling and other form of entertainment.
It can't be denied that all gamblers enter into gambling indirectly wanting to win although, I wouldn't be too trusting if they really just want entertainment by refusing to win. Besides, I think it's too high if you expect to get a big win for capital to build a business, you need to be really lucky to reach such a large amount while on the other hand there is no certainty and guarantee for anyone to be able to get it, what usually happens instead of getting a big win but the opposite happens, the amount you lose even increases because you are too chasing a victory which is quite impossible.
The fact is that when they get a win there is usually no alternative they will choose when the state of sensation is dominating other than greed, like humans usually they will never be satisfied with what they have got especially for those who are already addicted, and that's where greed will start. Yes the way you use is quite good, by separating the amount of funds to be allocated to different places, that's a good thing.