I agree with all your points but cannot disagree more on the inclusion of a difficulty slider for Souls games. I have been very adamant about a difficulty slider "cheapening the experience" or "jeopardising the artistic intent", but it really doesn't make a difference - at all.

If your enjoyment of the game stems from the fact that the game is difficult and the inclusion of a difficulty slider cheapens your "sense of accomplishment", then you might have to reevaluate your priorities.

Consider people with disabilities, for example, who are interested in the lore of Souls games and want to experience them themselves but can't because the games present themselves to be too difficult (for example in the way some bosses in Elden Ring have seemingly endless attack chains that give you no breathing room at all, requiring very precise input on the player's side), thus gatekeeping the experience from a potentially enthusiastic and interested player.

Or consider people who are just not interested in a hyper tense and difficult time and just want to experience the story and atmosphere of the game. What's wrong with that? How does that impact your enjoyment of the game if their experience is completely separate from yours?

For reference, I have platinumed numerous FromSoft Souls games and would not feel any less "proud" of that if the games had difficulty settings.