It is not uncommon for experts to be told sometimes: "Google does this" or "Apple does that" to justify terrible practices. Except that Apple and Google are just as often wrong as the rest of us. Their notoriety doesn't make them better, it just increases their level of accountability. Nothing more but nothing less.
"Rather than give up or wait for clients to ask, we’ve found that the practices I outlined in this article lead to a lasting culture at Viget that values thinking about accessibility throughout a project and throughout the company."