At this point it is clear difficulty is a staple of the series and the ambiance of all the Souls games. Every time a new game comes out, this complaint is raised by people who don't play the games and Miyazaki has decided not to add these explicit difficulty changing settings, so I think it's evident that its part of the soul of the games.
> Not all ability or disability is on the body, as some may lie on the mind, whether it is because of a persistent problem, a bad time in your life, or just constraints.
You can't expect authors to adjust to every single person on Earth circumstances on their works. This is not accessibility, and I think it's an argument in bad faith to claim it is.
This is not gatekeeping; If you want a challenge with fantastic ambience, you play a Souls game --- If you don't, you don't want to play Dark Souls, and that's perfectly fine, there's million other games where difficulty is not core to the experience. Not every piece of art or entertainment has to be palatable to everyone.