Gambling is indeed just a game, some people believe that gambling is like investing in fast forward, since in investing there is still that we rely sometimes in luck to profit. But generally the risks in trading is quite different from gambling. In trading you can minimize risks because you can execute some strategy that can do this, however in gambling you cannot change the outcome of a dice roll.
Gambling does not only involve dice games. People play poker too. Assuming that you know poker, it can be won by applying some strategies.
However, the difference between gambler and trader is, a trader can learn and enhance his wisdom even from zero, but gamblers need god gifted talent. All games rely on either luck or talent you are born with.
Yes that true, if you want to success using trading and gambling you need both to learn. It has a big difference in succeeding because trading need to a lot a time in learning and getting information on those things that you think will success, you can make sure the profit. But gambling is earning of money without assurance of profit, you need to spend a lot of time to get an experience but no goos result. Unlike in trading that you need an experience to become professional trader.