Are gaming tutorial the only thing that exist as tutorial? And even if we were only thinking about tutorials it isn`t uncommon that something you were taught in a tutorial in the start of the game you forget because you don`t use until several hours later and you keep bashing your head on the wall.
But let`s say a photoshop tutorial or a engineering class on youtube. Would you claim you perfectly understood and learnt the whole content by watching once and not even repeating or trying the knowledge?
That's changing the posts though. We were specifically talking about tutorials before and learning from them, and you don't need to repeat a tutorial multiple times, unless you have a learning issue.