It can be a wonderful thing to stumble on a game that just lets you turn your brain off and have some fun. There’s a unique catharsis to it, even; sometimes you simply don’t want to worry about concerning yourself with the finer details of a brainteasing plot or mastering complex inputs with precise timing.
When playing a game, there are certain functions that the player just plain expects to work functionally. In a shooter, one would expect their gun to fire every time they pulled the trigger (assuming it’s loaded, of course). With rhythm games, inputs need to function each and every time, lest the game be deemed “broken.”