If you are looking for something more challenging, then you should play the other difficulties.
Why? Just because you said so? Who are you to tell anyone how they should play their game?
... Is this a serious question?
My statement is the game is easier on easy mode. It is harder on hard mode.
It isn't that way because I said so. It is that way because that is just how it is. I'm not sure if you are familiar with difficulty settings in video games - but that is how they work. I said the game isn't being "Gatekept" because there is a difficulty mode that will let just about anyone pick it up and beat it.
Yes it is a serious question because your original statement said that these changes should be relegated to Story Mode and anyone who wanted these changes should only be allowed to play in that mode.
Yes I know how difficulty levels work in video games so I know that they do not all work in exactly the same way, e.g. hard mode in one game is not exactly the same as hard mode in the another. Some games, such as Solasta, have set difficulty levels while also allowing the player to tweak various elements to get things how one wants.
One does not 'beat' a game, one completes it. It is designed to allow you to complete it, not to stop you completing it. From what you just wrote it would appear that some 'newbie' 'beating' the game on the same difficulty as you is an affront to your masculinity or self-esteem.