Accessibility: The responsibility of a website
That role extends into a responsibility that websites have in terms of making their content and functionality accessible to everyone with or without a physical or mental limitation. A quote from Simone Weil reaffirms this:
“Equality is the public recognition, effectively expressed in institutions and manners, of the principle that an equal degree of attention is due to the needs of all human beings.”
An equal degree - not just a small or simple amount that's easy enough to implement. So, not only should websites try to improve the accessibility and user experience of their website, but they should continue to do so until the experience of the disabled website visitor rivals that of the non-disabled visitor.