my take on it is that a Video Game should NEVER let you chose a difficulty mode after starting the game for the first time... NEVER
WHY?
the issue with difficulty modes is the lack of consistency that is impossible to get rid of.
what is "easy"? what is "normal"? what is "hard"?
Play DMC3 on easy and you will still have a really challenging game... play the latest Ratchet & Clank on easy and you will fall asleep as you finish the final boss...
the player can never know which mode is the best, which mode is way too dumbed down, which mode is for people that already know the game and want an additional challenge.
yes the devs often write info texts like "This mode is for experienced action game players" and shit like that, but we all know these are pretty nonsensical due to the varying degrees of skill people have.
WHAT MAKES 1 MODE ONLY THE BETTER WAY?
well, look at the history of videogames... did you see a difficulty option in GTA4? Vice City? San Andreas?... did you find a difficulty selector in Mario 64, Sunshine, Galaxy? or maybe in Dark Souls, Bloodborne, Elden Ring? did you see one in Ocarina of Time, Majoras Mask, Twilight Princess or Breath of the Wild?
see a pattern here? these are some of the most beloved games, some of the highest ranking games, some of the most iconic titles... none of them have a difficulty selector.
some of them unlock a higher difficulty completing them or 100%ing them, but not as the default when starting them for the first time.
and I think this is also the reason they are so beloved and highly regarded.
yes there are games with difficulty selections that also are very popular and beloved, but the best of the best do all only give you a single mode to chose from.
IMO this single difficulty mkde approach is tasking the developers with making the best single way to play the game and the developers need to make sure that this one mode is perfectly balanced, otherwise the game will not be popular. if it's too mundane or too difficult the game might not succeed.
and this single mode approach also gives the developers the time and focus to make thatvone mode that good, no need to think about how the hard mode will work or how the easy mode will work, it's just 1 mode to worry about...
and the article also kinda said that with the last paragraph... have one mode, THAT'S THE GAME, and just make that as good as possible.
I also pleased it like I did because additional modes after finishing a game are absolutely welcome, something that gives you a more challenging way to play (new game + is usually that, or normal unlockable higher modes)