Accessibility is more than just Perceivability - a characteristic robots would appreciate. Accessibility includes Operability and Usability, these are more human focused, and less robot focused principles.
What's the point of having a perceivable interface without it being usable or operable? See this: https://news.ycombinator.com/item?id=7885113 -- for accessibility tips that have no relevance to spiders/bots, but is fundamental to accessibility.
That's where this "robots are like blind/deaf people" argument falls down.
Accessibility is about removing barriers for humans, with human related disabilities. That making those changes also makes content more consumable by a spider or crawler is a positive side-effect. A great positive side-effect, but not the primary aim.
What's the point of having a perceivable interface without it being usable or operable? See this: https://news.ycombinator.com/item?id=7885113 -- for accessibility tips that have no relevance to spiders/bots, but is fundamental to accessibility.
That's where this "robots are like blind/deaf people" argument falls down.
Accessibility is about removing barriers for humans, with human related disabilities. That making those changes also makes content more consumable by a spider or crawler is a positive side-effect. A great positive side-effect, but not the primary aim.