There's a lot more than one blind person out there, most of whom would simply never do business with them without letting them know.
And it's not all images that are a problem, just those that are images of large blocks of text, like the restaurant menu that was given as an example. If it's a short bit of text like a logo, that's what ALT tags are for.
When there's the entire menu full of text as an image, that's just plain bad design. It's worse for everyone and it won't even get indexed by search engines. Text should be text. It's just easier that way.
And it's not all images that are a problem, just those that are images of large blocks of text, like the restaurant menu that was given as an example. If it's a short bit of text like a logo, that's what ALT tags are for.
When there's the entire menu full of text as an image, that's just plain bad design. It's worse for everyone and it won't even get indexed by search engines. Text should be text. It's just easier that way.