Summary: Doing Web and Mobile Accessibility requires that you take a proactive approach, using good UX research and design methods. Anything short of that will undermine or fall short in delivering not just a good experience to your users with disabilities, but also leaving you vulnerable to ongoing violations of Accessibility legislation.
Tackling Accessibility Starts with Changing How you Think about it
Like many companies lately, Domino’s pizza was sued by a blind man who could not access the company's website. The blind man won and Domino's appealed. Domino's appeal logic reveals a lot about why Web Accessibility does not get done, or get done right. The pizza chain said companies don’t have to make their websites and apps fully accessible as long as disabled customers have other ways to get the same goods and services, such as a telephone hotline. Ouch.