i don't think that choices are necessarily always a good thing. For example, I think that adding a choice for Last of Us' ending would've been terrible and made the game's plot very bland as opposed to what it was. Even if I never picked the "other" option knowing that it was just an option would've made me care less about the ending. Likewise, even if I never pick the easier difficulty, the fact that the game would frame struggling with a both as a choice as opposed to a necessity would take away much of what I personally like about the games. I think forcing the player to
approach the game a certain way is one important way of making the game have a certain atmosphere or tone to it, and choices can take away what the game wants the player to feel like in order to turn it into more of a sandbox - which is perfectly fine depending on the game, mind.
That and to be real I don't really think that Souls games are actually hard. Like, real talk, I have nerve damage on one hand and it makes for certain games like shooters to be almost unplayable for me. Souls games are honestly really slow paced and easy to learn, so I don't think they are exclusionary based on reflex speed or anything. I could see that argument being made for Sekiro, but souls games are REALLY slow paced and not at all reflex based.
That said, if it does get an easy mode not like I'll complain, I'll just slowly lose interest in the series over time probably, since the framing of "do it this way or you don't get to see the rest of the game" is what made me fall in love with the series. It probably would sell more though to be honest lol