From what I know there is not reason to gamble in a smart way because the odds are going to be against you no matter what so it does not matter what you do.
You just need luck and that is what is comes down to luck and more luck.
You are right that gambling is based on luck. There are professional gamblers though that finds a way to have more chances to get lucky and that is by creating more sessions and play according to plan of betting - following strictly the system no matter what. They have mastered these by experienced and many tests.
which is right mate the more you play the more chances that you can build your safety system but that one cant be the same with another gambler so theres nothing but your own good understanding about the game you are playing. smart means some edge in accordance to the game you gamble.