The objections to and avoidance of methods/processes/techniques that further this goal are often excused with: "Never attribute to malice that which is adequately explained by stupidity (or ignorance)."
Are people who provide materials for the Web, but ignore the "everyone" part ("after all, I'm not writing this for blind people") bigots, or just uninformed, but well-meaning?
In the end it doesn't matter. Violating human rights because of the convenience of not having to consider some excluded pejoratively-named group is inexcusable.
When we are in a position to affect the process, whether it be segregation, institutionalization, or Web Accessibility, we should act, much as many react to insults to their kin.
After all, we are all members of one another.