Playing slot game will not have to use strategies because this gambling games is base on the luck. We don't know what strategies they used but that could not work if they don't have luck. They can use strategy in a gambling games based on skill so they need to improve their skill and practice it so they will know if their strategy is works or they need to make another strategies.
blackjack and poker are example of games that are based on skill and i do not think luck would be enough for you to win in any of these skill based games. you would need to learn how to play the game, how to execute strategy and you need massive practice with different kinds of players to really hone your skills. these games require an extensive level of concentration and mental games that luck would not save you at all
We may difficult to win in slot game so you don't have to be seriously playing that game. It is enough for you to enjoy your time with some enough money so you can stop gambling when you think it is enough.
is there anyone that takes slot games seriously? i mean i sit down and click the button and wait for me to win there is not much thinking you need to do here also no strategy for you to employ so just enjoy and have fun (unless you are losing)