-Development of Risk taking ability; to win big in life, you must be willing to try, and gamblers have so developed their risk taking ability.
You need to take some risk in real life in order to have some real experience of what would have happened if you try this and that. Sometimes we need to try the hardest things to make our life easier in the future and continue to explore some businesses that would suit our daily activities in order to further expand our source of incomes. This is not possible unless you try to use some big capital of money in order to try it and you will have some idea on how to fix it whenever things are not going your way. Unlike you were just saying "What if?" doing the actual things will give you the reality on how to handle it well.