I don't think there's a place for non-changeable difficulty settings in FromSoft games, imo. In any game, for that matter. It just artificially keeps more people from playing your games and makes them less accessible to people who are struggling for whatever reason that may be.

I get the "vision™" argument in that developers create games as they want them to exist and don't want to dilute it. However, I think it's a very narrow-minded view to have nowadays. Accessibility options for games are quite common too after all