Normal is what the game is supposed to be played on. Its the normal setting.
And yet most games are designed these days FAR too easy. Normal is meant to be just right in terms of challenge and no/little frustration. Sadly, the devs often make it way too simple and the game becomes a cakewalk either at the start or further into the game once your character/party becomes more powerful.
If you enjoy 1-shotting everything and having literally on challenge, that's cool, but that bores me to tears instead. Many games your character is meant to be up against the odds, so yeah, it should be tease to you as the player trying to get through it as well. Makes little sense otherwise when things are so easy.
Normal is EASY in most modern games. Games have gotten so much easier than they were in the past. Normal difficulty used to be alright, but it's not anymore. Hard is the new 'normal' difficulty.
What do you think are your collective hours spent playing videogames? How many skills do you think you've acquired, timing, reaction, hell even button layout memorization? You don't think that you're just better than someone who's been playing games for even 5 years?