Some gambling site already offered tutorials on how games that are found on their sites are played, every games have tutorials everywhere, you can ask a friend, you can check Youtube, you can read articles you can ask here, tutorials are not really that hard to find, only on strategist on how to win, is one tutorial that are hard to find.
these tutorials tell us only about the rules of the games but they don't promise to give us the winning strategy. so every gambler has to get experience himself and use it in future if he won't disappoint in gambling.
On where you do get that tutorials are considered to be strategies? Of course its just normal that it is a set of instructions on how a game to be played
not on making advantage with it and to know that luck based gambling games doesnt really need any experience nor knowledge for you to be profitable
because no matter how hard you do try it will always vary with luck except to those who do really need some skills and knowledge based kind of games.
When you do gamble then studying or learning up some lesson first will be only applicable into other types.