These are subjective statements though and different people want different things. And difficulty variation can broaden the audience while not really changing the game. Sometimes I love a fight. Sometimes I want a story. Sometimes I want to couch coop with my youngest kid and he struggles with some games that he otherwise loves (looking at you Cuphead) that an easier mode would totally fix. And he absolutely loves Sonic, but the originals would be unplayable for him if not for modern saving and non permadeath. Or emulation with save states and cheat codes.

Why are you trying to convince people that if a game is too difficult or long periods between saving doesn't work for them then it is their fault and not that of the game design. That's a weird stance to take. If someone designed a car that was generally very nice but with the gear shift next to the passenger seat door, would you say that is just a car for people with super long arms or would you say that was a poor design choice that is going to massively limit an otherwise nice car?

This seems to act like games and their default difficulty options are commandments carved in stone when they're not. If I find a game to difficulty to enjoy and then find it enjoyable by cheating, that's what I'm gonna do.