Look, you asked why. Some games aren't for everyone. I say the same thing about games designed for children not needing a prepare to die mode. FS games have an intended audience. That audience is more the "hard-core" crowd. I think, for example, there are very few people who would say colorblind options or hearing impared options are a bad thing within reason for most games. Difficulty is an entirely different issue. Especially when people have beaten these games with banana peels.

Without discussing the topic at hand.

The above comment answers your question on why people "are against" accesibility options. You know peoples standpoint already otherwise you wouldn't have made this post in the first place. There seems to be no real reason to restart this extremely common topic again where everyone repeats what has been said in every thread before this.

Having the player overcome challenges is a large part of what those games are about, and it's even baked in their atmosphere, design, and themes.

Since this is crucial to those games, I think the better question is how do you keep this vision intact while accommodating people who may not be physically capable of playing it. And I would 100% agree that FromSoftware could do a better job with accessibility options. But if your main concern is giving disabled people more access to play these games, I think you'd have more success tackling this from an input/controller perspective. If a disabled person could play on a controller or device they were comfortable with, the issue would be basically solved right there - especially since these games are not nearly as hard as the community makes them out to be, but maybe that's a separate discussion.

And the best thing about accessibility options is you don't have to use them if you don't want/need to and get the exact same experience as before surprised pikachu face