Back when I did web design stuff and I couldn't get anyone to put any effort into accessibility, I would "sell" the concept as it being SEO: search engines see

Back when I did web design stuff and I couldn't get anyone to put any effort into accessibility, I would "sell" the concept as it being SEO: search engines see what we put in for text, not images. Accessibility for humans is accessibility for Google. It was pitiful that I had to do this but there you have it.