Yes, gambling needs just dedication to win with a particular skill. So, if we have enough skill to make profits then we can just follow the some idea and stargey to get bigger returns from gambling. The amount of winning from gambling is always big as I have seen around my friends circle.
For some people, gambling is the good resources for making handsome amount of return as gambling reward, which can be achieved by them. Because gambling just need some knowledge and well management of risk.
So, if we have capability to manage our risk. Then making big profit from gambling is so easy.
Yes, the amount of wining from gambling is absolutely based on the skill we have towards gambling. Because gambling has both extremes: winning side as well as loosing side. Intelligent people simply go to wining side and making lot of money from it. So making money from gambling is countless.
It depends on what game you are playing. Of course poker takes skill, but im not sure about dice, roulette or slots. Isn't this 100% luck? there's not much skill you can use on those games, specially slot which is basically clicking on "spin".