There’s a video of a guy beating an Elden Ring boss with his chin. I find your comment frankly insulting towards, as you put it, “differently abled consumers”.
Olympic paraplegics jumping curbs are worthy of admiration for their efforts. Curb cuts are still a worthwhile innovation.
An easy mode is not a curb cut. Options for color blindness, visual cues for hearing impaired, dyslexia friendly fonts or remappable controls are.
There are far more impairments than color blindness, dyslexia, and motor control problems. While it's not possible to accommodate every single one perfectly. Easy modes are one of the simpler ways to help a broad cross section.
Honest question: how can a game like Dark Souls (or Elden Ring which is already much easier and more approcheable) possibly convey the atmosphere of a dark, merciless world with an easy mode?