This is well worth the read, here are just a couple of gems from Gary Barber’s article titled Kill Accessibility:
The old UX catch call is never truer here – we are not the users. The disparity between us and the people we are really working for, with accessibility, is sometimes just too great for us to even get a idea of what it is like, no matter how many videos of people using assistive technology we see.
And this zinger:
In reality there is no socially inspired public relations value in accessibility. A business can be seen to get more value out of sponsoring a guide dog than making their web site accessible.